Timeline polish + simulate/timeline lockstep + default base level

Timeline behavior:
- Natural end of playback now clamps to Duration and holds values there
  (no auto-rewind, no simulation reset) — symmetric between editor and
  gameplay. New Restart button does the rewind+replay sequence explicitly.
- Pause now freezes character movement too (new SetSimulationPaused on
  the PlayerController stops AI ticks without restoring saved transforms
  the way StopSimulation does).
- Simulate toolbar button is wired through the timeline: with at least one
  track, it toggles Play/Pause; without tracks it falls back to direct
  StartSimulation/StopSimulation. Label stays "Simulate"/"Stop" so it
  doesn't duplicate the timeline panel's own Play button.
- SetKeyTime re-sorts keys; clicking a key selects the animated actor
  exclusively (ClearSelection first) so splines release their handles.
- Seek now invalidates LastAppliedValues: a manual property edit between
  two seeks used to leak onto the next key because the cache made the
  next seek skip the write.
- Keyframe colors are saturated: vivid blue / orange / green / yellow
  instead of the washed-out pastels.

Scene load robustness:
- New LoadActorClassRobust chains TryLoadClass, LoadPackage+retry,
  LoadObject, StaticLoadClass — covers cold BP post-load races that made
  actors silently fail to spawn on the first PIE of a session.
- Failed class loads and null-spawn actors now log Error with class path
  and location; a Warning/Log recap lands at the end of every load.
- Actors that end up hidden or invalid after the pipeline get their own
  Warning/Error lines for post-mortem diagnosis.

Base level handling:
- New bIsDefault flag on FPS_Editor_BaseLevelEntry. The entry marked
  default is loaded automatically at editor startup (when no pending
  scenario is queued) and as fallback when a scenario saved without a
  base level ("Unfiled" folder) is opened.
- Removed the hardcoded "None" option from the base level popup — the
  project defines its own default entry instead (e.g. renamed to "None").
- Previous behavior of LoadBaseLevelAsSublevel("Unfiled") is gone; the
  bogus sublevel load used to leave the loading screen stuck.

Spline visuals:
- SetRenderCustomDepth is now off by default and only turned on while the
  spline is selected — project outline post-process materials no longer
  highlight every loaded spline.
- ImportFromCustomProperties forces SetHandlesVisible(false) and
  SetSelected(false) after setting points (both PS_Editor and
  PS_BehaviorEditor versions) so loaded splines start in the deselected
  visual state.

AI in editor:
- Spawned pawns now get their AI disabled synchronously right after
  SpawnActor (in addition to the existing next-tick fallback) so the BT
  can't drive the character for the 1-frame gap between spawn and timer.

Co-Authored-By: Claude Opus 4.7 (1M context) <noreply@anthropic.com>

Unreal/Plugins/PS_BehaviorEditor/Source/PS_BehaviorEditor/PS_BehaviorEditor_AISpline.cpp

@@ -28,7 +28,9 @@ APS_BehaviorEditor_AISpline::APS_BehaviorEditor_AISpline()
 	SplineMeshComp->SetCollisionResponseToChannel(ECC_Camera, ECR_Block);
 	SplineMeshComp->bUseComplexAsSimpleCollision = true;
 	SplineMeshComp->SetCastShadow(false);
-	SplineMeshComp->SetRenderCustomDepth(true);
+	// Custom depth off by default; SetSelected enables it while selected so the outline PP
+	// only catches the currently-selected spline.
+	SplineMeshComp->SetRenderCustomDepth(false);
 	SplineMeshComp->SetCustomDepthStencilValue(2);
 
 	// Handle parent
@@ -409,6 +411,8 @@ void APS_BehaviorEditor_AISpline::SetSelected(bool bSelected)
 	{
 		UMaterialInstanceDynamic* Mat = bSelected ? SplineMatSelected : SplineMat;
 		if (Mat) SplineMeshComp->SetMaterial(0, Mat);
+		// Only participate in the custom-depth pass while selected (see SplineActor).
+		SplineMeshComp->SetRenderCustomDepth(bSelected);
 		SplineMeshComp->SetCustomDepthStencilValue(bSelected ? 1 : 2);
 	}
 	if (CenterCubeMat)
@@ -528,4 +532,10 @@ void APS_BehaviorEditor_AISpline::ImportFromCustomProperties(const TMap<FString,
 		Priority = FCString::Atoi(**PriStr);
 
 	UpdateSplineMaterials();
+
+	// Force deselected state on load: handles default to visible on creation and
+	// UpdateVisualization uses handle visibility to pick the "selected" material.
+	SetHandlesVisible(false);
+	SetSelected(false);
+	UpdateVisualization();
 }

Unreal/Plugins/PS_Editor/Source/PS_Editor/GameMode/PS_Editor_PlayerController.cpp

@@ -66,6 +66,7 @@ void APS_Editor_PlayerController::BeginPlay()
 		}
 
 		// Check if PROSERVE set a pending base level + scenario via the subsystem
+		bool bHandledStartupLevel = false;
 		if (UGameInstance* GI = GetGameInstance())
 		{
 			if (UPS_Editor_GameInstanceSubsystem* Sub = GI->GetSubsystem<UPS_Editor_GameInstanceSubsystem>())
@@ -88,6 +89,7 @@ void APS_Editor_PlayerController::BeginPlay()
 						}
 					}
 					LoadBaseLevelAsSublevel(Sub->PendingBaseLevel, ResolvedMapPath, ResolvedExtras);
+					bHandledStartupLevel = true;
 
 					if (!Sub->PendingScenarioName.IsEmpty() && SpawnManager && SceneSerializer)
 					{
@@ -101,6 +103,23 @@ void APS_Editor_PlayerController::BeginPlay()
 			}
 		}
 
+		// No pending base level from the subsystem — fall back to the catalog's default
+		// (entry with bIsDefault=true) so the editor always starts with some ground/lighting
+		// instead of a bare persistent level.
+		if (!bHandledStartupLevel)
+		{
+			for (const FPS_Editor_BaseLevelEntry& Entry : Master->BaseLevels)
+			{
+				if (Entry.bIsDefault && !Entry.DisplayName.IsEmpty() && !Entry.MapPath.IsEmpty())
+				{
+					UE_LOG(LogTemp, Log, TEXT("PS_Editor: Loading catalog default base level at startup — DisplayName='%s', MapPath='%s'"),
+						*Entry.DisplayName, *Entry.MapPath);
+					LoadBaseLevelAsSublevel(Entry.DisplayName, Entry.MapPath, Entry.AdditionalSublevels);
+					break;
+				}
+			}
+		}
+
 		UE_LOG(LogTemp, Log, TEXT("PS_Editor: MasterCatalog loaded (%d catalogs, %d entries). BaseLevel: '%s'"),
 			Master->Catalogs.Num(), SpawnManager->GetResolvedEntries().Num(), *CurrentBaseLevel);
 	}
@@ -259,6 +278,37 @@ void APS_Editor_PlayerController::StartSimulation()
 	UE_LOG(LogTemp, Log, TEXT("PS_Editor: Simulation started (%d actors saved)"), SimulationSavedTransforms.Num());
 }
 
+void APS_Editor_PlayerController::SetSimulationPaused(bool bPaused)
+{
+	// Toggle AI tick + BT on every spawned pawn without touching bSimulating or the saved
+	// transforms — the timeline's Pause uses this so characters freeze instead of snapping
+	// back to their pre-play positions.
+	if (!SpawnManager) return;
+
+	for (const TWeakObjectPtr<AActor>& Weak : SpawnManager->GetSpawnedActors())
+	{
+		APawn* P = Cast<APawn>(Weak.Get());
+		if (!P) continue;
+
+		P->SetActorTickEnabled(!bPaused);
+		if (AAIController* AIC = Cast<AAIController>(P->GetController()))
+		{
+			AIC->SetActorTickEnabled(!bPaused);
+			if (UBrainComponent* Brain = AIC->GetBrainComponent())
+			{
+				if (bPaused)
+				{
+					Brain->StopLogic(TEXT("PS_Editor_Pause"));
+				}
+				else
+				{
+					Brain->RestartLogic();
+				}
+			}
+		}
+	}
+}
+
 void APS_Editor_PlayerController::StopSimulation()
 {
 	if (!bSimulating) return;

Unreal/Plugins/PS_Editor/Source/PS_Editor/GameMode/PS_Editor_PlayerController.h

@@ -74,6 +74,14 @@ public:
 	UFUNCTION(BlueprintCallable, Category = "ASTERION|PS_Editor")
 	bool IsSimulating() const { return bSimulating; }
 
+	/**
+	 * Toggle AI execution on all spawned pawns without changing the simulation's
+	 * saved-transforms state. Used by the timeline's Pause so the characters freeze
+	 * in place instead of snapping back to their pre-play positions.
+	 */
+	UFUNCTION(BlueprintCallable, Category = "ASTERION|PS_Editor")
+	void SetSimulationPaused(bool bPaused);
+
 	/** Load a base level as sublevel for visual context. Unloads previous sublevel.
 	 *  @param LevelName           Display name stored in CurrentBaseLevel (used for scene filtering).
 	 *  @param MapPath             Full package path for LoadLevelInstance (e.g. "/Game/Maps/Warehouse").

Unreal/Plugins/PS_Editor/Source/PS_Editor/Serialization/PS_Editor_SceneLoader.cpp

@@ -13,11 +13,39 @@
 #include "JsonObjectConverter.h"
 #include "Misc/FileHelper.h"
 #include "Misc/Paths.h"
+#include "Misc/PackageName.h"
 #include "UObject/UnrealType.h"
+#include "UObject/Package.h"
 #include "Components/ActorComponent.h"
 #include "Engine/World.h"
 #include "GameFramework/PlayerController.h"
 
+namespace
+{
+	/** Same robust class loader as in SceneSerializer — kept local to avoid an extra export. */
+	static UClass* LoadActorClassRobust_SceneLoader(const FString& ClassPath)
+	{
+		if (ClassPath.IsEmpty()) return nullptr;
+
+		FSoftClassPath SoftPath(ClassPath);
+		if (UClass* C = SoftPath.TryLoadClass<AActor>()) return C;
+
+		const FString PackageName = FPackageName::ObjectPathToPackageName(ClassPath);
+		if (!PackageName.IsEmpty())
+		{
+			if (UPackage* Package = LoadPackage(nullptr, *PackageName, LOAD_None))
+			{
+				if (UClass* C = SoftPath.TryLoadClass<AActor>()) return C;
+				if (UClass* C = FindObject<UClass>(nullptr, *ClassPath)) return C;
+			}
+		}
+
+		if (UClass* C = LoadObject<UClass>(nullptr, *ClassPath)) return C;
+		if (UClass* C = StaticLoadClass(AActor::StaticClass(), nullptr, *ClassPath)) return C;
+		return nullptr;
+	}
+}
+
 bool UPS_Editor_SceneLoader::LoadScene(const UObject* WorldContextObject, const FString& SceneName, TArray<AActor*>& OutActors, bool bStripEditorComponents, EPS_Editor_SceneLoadFilter Filter)
 {
 	OutActors.Empty();
@@ -147,22 +175,13 @@ AActor* UPS_Editor_SceneLoader::SpawnActorFromData(UWorld* World, const FPS_Edit
 	if (Filter == EPS_Editor_SceneLoadFilter::PreloadOnly && !ActorData.bPreload) return nullptr;
 	if (Filter == EPS_Editor_SceneLoadFilter::ExcludePreload && ActorData.bPreload) return nullptr;
 
-	// Load class (supports both Blueprint and C++ classes). TryLoadClass forces the full
-	// Blueprint load path (package + generated class + post-load) which LoadObject<UClass>
-	// can skip on a cold first call, leaving the class null intermittently.
-	FSoftClassPath SoftPath(ActorData.ClassPath);
-	UClass* LoadedClass = SoftPath.TryLoadClass<AActor>();
+	// Robust class load: tries TryLoadClass, then force-loads the package and retries,
+	// then falls back to LoadObject / StaticLoadClass. Covers cold-start races where a BP
+	// package isn't fully post-loaded yet.
+	UClass* LoadedClass = LoadActorClassRobust_SceneLoader(ActorData.ClassPath);
 	if (!LoadedClass)
 	{
-		LoadedClass = LoadObject<UClass>(nullptr, *ActorData.ClassPath);
-	}
-	if (!LoadedClass)
-	{
-		LoadedClass = FindObject<UClass>(nullptr, *ActorData.ClassPath);
-	}
-	if (!LoadedClass)
-	{
-		UE_LOG(LogTemp, Warning, TEXT("PS_Editor SceneLoader: Failed to load class: %s"), *ActorData.ClassPath);
+		UE_LOG(LogTemp, Error, TEXT("PS_Editor SceneLoader: Failed to load class after all fallbacks: %s"), *ActorData.ClassPath);
 		return nullptr;
 	}
 
@@ -172,7 +191,8 @@ AActor* UPS_Editor_SceneLoader::SpawnActorFromData(UWorld* World, const FPS_Edit
 	AActor* SpawnedActor = World->SpawnActor<AActor>(LoadedClass, ActorData.Location, ActorData.Rotation, SpawnParams);
 	if (!SpawnedActor)
 	{
-		UE_LOG(LogTemp, Warning, TEXT("PS_Editor SceneLoader: Failed to spawn: %s"), *ActorData.ClassPath);
+		UE_LOG(LogTemp, Error, TEXT("PS_Editor SceneLoader: SpawnActor returned null for %s at %s"),
+			*ActorData.ClassPath, *ActorData.Location.ToString());
 		return nullptr;
 	}
 

Unreal/Plugins/PS_Editor/Source/PS_Editor/Serialization/PS_Editor_SceneSerializer.cpp

@@ -15,11 +15,47 @@
 #include "JsonObjectConverter.h"
 #include "Misc/FileHelper.h"
 #include "Misc/Paths.h"
+#include "Misc/PackageName.h"
 #include "HAL/PlatformFileManager.h"
 #include "UObject/UnrealType.h"
+#include "UObject/Package.h"
 #include "Components/ActorComponent.h"
 #include "Engine/World.h"
 
+namespace
+{
+	/**
+	 * Robust class load for Blueprint actor classes. Layers several strategies so we cover
+	 * cold-start cases where the package isn't in memory yet and async post-load phases
+	 * that leave TryLoadClass returning null briefly.
+	 */
+	static UClass* LoadActorClassRobust(const FString& ClassPath)
+	{
+		if (ClassPath.IsEmpty()) return nullptr;
+
+		// 1. SoftClassPath::TryLoadClass forces the full BP load chain (package + generated class + post-load)
+		FSoftClassPath SoftPath(ClassPath);
+		if (UClass* C = SoftPath.TryLoadClass<AActor>()) return C;
+
+		// 2. Force-load the containing package synchronously, then retry
+		const FString PackageName = FPackageName::ObjectPathToPackageName(ClassPath);
+		if (!PackageName.IsEmpty())
+		{
+			UPackage* Package = LoadPackage(nullptr, *PackageName, LOAD_None);
+			if (Package)
+			{
+				if (UClass* C = SoftPath.TryLoadClass<AActor>()) return C;
+				if (UClass* C = FindObject<UClass>(nullptr, *ClassPath)) return C;
+			}
+		}
+
+		// 3. LoadObject / StaticLoadClass as last-resort fallbacks
+		if (UClass* C = LoadObject<UClass>(nullptr, *ClassPath)) return C;
+		if (UClass* C = StaticLoadClass(AActor::StaticClass(), nullptr, *ClassPath)) return C;
+		return nullptr;
+	}
+}
+
 bool UPS_Editor_SceneSerializer::SaveScene(const FString& SceneName, UPS_Editor_SpawnManager* SpawnManager)
 {
 	if (!SpawnManager || SceneName.IsEmpty())
@@ -185,31 +221,27 @@ bool UPS_Editor_SceneSerializer::LoadScene(const FString& SceneName, UPS_Editor_
 
 	// Re-spawn actors from saved data
 	int32 SpawnedCount = 0;
+	int32 FailedClassCount = 0;
+	int32 FailedSpawnCount = 0;
 	UPS_Editor_SceneLoader::bIsCurrentlyLoading = true;
 	for (const FPS_Editor_ActorData& ActorData : SceneData.Actors)
 	{
-		// TryLoadClass synchronously loads the BP package AND resolves the generated class,
-		// handling redirectors. Plain LoadObject<UClass> can return null on a cold first load
-		// of a Blueprint whose package hasn't been through post-load yet — that's the source
-		// of the "it works on the second try" bug.
-		FSoftClassPath SoftPath(ActorData.ClassPath);
-		UClass* LoadedClass = SoftPath.TryLoadClass<AActor>();
+		UClass* LoadedClass = LoadActorClassRobust(ActorData.ClassPath);
 		if (!LoadedClass)
 		{
-			// Fallback for paths that aren't a "Class'...'" soft ref (e.g. legacy data)
-			LoadedClass = LoadObject<UClass>(nullptr, *ActorData.ClassPath);
-		}
-		if (!LoadedClass)
-		{
-			LoadedClass = FindObject<UClass>(nullptr, *ActorData.ClassPath);
-		}
-		if (!LoadedClass)
-		{
-			UE_LOG(LogTemp, Warning, TEXT("PS_Editor: Failed to load class: %s"), *ActorData.ClassPath);
+			++FailedClassCount;
+			UE_LOG(LogTemp, Error, TEXT("PS_Editor: Failed to load class after all fallbacks: %s"), *ActorData.ClassPath);
 			continue;
 		}
 
 		AActor* SpawnedActor = SpawnManager->SpawnActorDirect(LoadedClass, ActorData.Location, ActorData.Rotation, ActorData.Scale);
+		if (!SpawnedActor)
+		{
+			++FailedSpawnCount;
+			UE_LOG(LogTemp, Error, TEXT("PS_Editor: SpawnActor returned null for class %s at %s"),
+				*ActorData.ClassPath, *ActorData.Location.ToString());
+			continue;
+		}
 		if (SpawnedActor)
 		{
 			// Restore stable actor ID from the JSON (needed so timeline tracks can find the actor)
@@ -298,32 +330,67 @@ bool UPS_Editor_SceneSerializer::LoadScene(const FString& SceneName, UPS_Editor_
 			}
 
 			// Stop AI on spawned pawns (editor mode — AI only runs during Simulate)
+			// Apply immediately if the AIController is already assigned (typical path, since
+			// SpawnActor completes the full PossessedBy chain synchronously), and keep the
+			// deferred call as a safety net for any case where auto-possession takes longer.
+			// Without the immediate call, the BT has a 1-frame window to move the pawn.
 			if (APawn* P = Cast<APawn>(SpawnedActor))
 			{
-				TWeakObjectPtr<APawn> WeakP = P;
-				P->GetWorldTimerManager().SetTimerForNextTick([WeakP]()
+				auto DisableAI = [](APawn* Pawn)
 				{
-					if (APawn* Pawn = WeakP.Get())
+					if (!Pawn) return;
+					Pawn->SetActorTickEnabled(false);
+					if (AAIController* AIC = Cast<AAIController>(Pawn->GetController()))
 					{
-						if (AAIController* AIC = Cast<AAIController>(Pawn->GetController()))
+						AIC->SetActorTickEnabled(false);
+						if (UBrainComponent* Brain = AIC->GetBrainComponent())
 						{
-							AIC->SetActorTickEnabled(false);
-							if (UBrainComponent* Brain = AIC->GetBrainComponent())
-							{
-								Brain->StopLogic(TEXT("PS_Editor"));
-							}
-							Pawn->SetActorTickEnabled(false);
+							Brain->StopLogic(TEXT("PS_Editor"));
 						}
 					}
+				};
+				DisableAI(P);
+
+				TWeakObjectPtr<APawn> WeakP = P;
+				P->GetWorldTimerManager().SetTimerForNextTick([WeakP, DisableAI]()
+				{
+					DisableAI(WeakP.Get());
 				});
 			}
 
+			// Post-spawn diagnostics: if the actor got hidden or destroyed by its own BP logic
+			// we want that visible in the log so the "character not loading first time" bug
+			// can be traced to a specific actor.
+			if (!IsValid(SpawnedActor))
+			{
+				UE_LOG(LogTemp, Error, TEXT("PS_Editor: Actor %s became invalid after load pipeline"), *ActorData.ClassPath);
+			}
+			else if (SpawnedActor->IsHidden())
+			{
+				UE_LOG(LogTemp, Warning, TEXT("PS_Editor: Actor %s (%s) spawned HIDDEN after load"), *SpawnedActor->GetName(), *ActorData.ClassPath);
+			}
+			else
+			{
+				UE_LOG(LogTemp, Verbose, TEXT("PS_Editor: Spawned %s (%s) at %s"), *SpawnedActor->GetName(), *ActorData.ClassPath, *ActorData.Location.ToString());
+			}
+
 			SpawnedCount++;
 		}
 	}
 
 	UPS_Editor_SceneLoader::bIsCurrentlyLoading = false;
 
+	const int32 TotalExpected = SceneData.Actors.Num();
+	if (FailedClassCount > 0 || FailedSpawnCount > 0)
+	{
+		UE_LOG(LogTemp, Warning, TEXT("PS_Editor: Scene load incomplete — %d/%d actors spawned, %d class loads failed, %d spawns failed"),
+			SpawnedCount, TotalExpected, FailedClassCount, FailedSpawnCount);
+	}
+	else
+	{
+		UE_LOG(LogTemp, Log, TEXT("PS_Editor: Scene load complete — %d/%d actors spawned"), SpawnedCount, TotalExpected);
+	}
+
 	// Push timeline data into the world subsystem (editor mode: no auto-play)
 	if (APS_Editor_PlayerController* EditorPC = Cast<APS_Editor_PlayerController>(GetOuter()))
 	{

Unreal/Plugins/PS_Editor/Source/PS_Editor/Spawn/PS_Editor_SpawnCatalog.h

@@ -85,6 +85,15 @@ struct FPS_Editor_BaseLevelEntry
 	 */
 	UPROPERTY(EditAnywhere, BlueprintReadWrite, Category = "ASTERION|PS_Editor")
 	TArray<TObjectPtr<UPS_Editor_SpawnCatalog>> Catalogs;
+
+	/**
+	 * If true, this entry is used as a fallback when loading a scenario that was saved
+	 * without a base level. Exactly one entry should be marked as default — if several
+	 * are, the first one wins; if none is, scenarios without a base level keep whatever
+	 * sublevel is currently loaded.
+	 */
+	UPROPERTY(EditAnywhere, BlueprintReadWrite, Category = "ASTERION|PS_Editor")
+	bool bIsDefault = false;
 };
 
 /**

Unreal/Plugins/PS_Editor/Source/PS_Editor/Spawn/PS_Editor_SpawnManager.cpp

@@ -187,29 +187,35 @@ AActor* UPS_Editor_SpawnManager::SpawnFromCatalogAtLocation(int32 Index, FVector
 		IPS_Editor_EditableInterface::Execute_OnEditorModeChanged(SpawnedActor, true);
 	}
 
-	// Stop AI logic on spawned pawns in editor mode (deferred — AIController may not be assigned yet)
+	// Stop AI logic on spawned pawns in editor mode. Apply synchronously (AIController is
+	// usually already possessing by the time SpawnActor returns, so waiting a frame lets the
+	// BT kick off and move the pawn) and keep the deferred fallback for the occasional case
+	// where auto-possession happens later.
 	if (APS_Editor_PlayerController* EditorPC = Cast<APS_Editor_PlayerController>(PC))
 	{
 		if (!EditorPC->IsSimulating())
 		{
 			if (APawn* SpawnedPawn = Cast<APawn>(SpawnedActor))
 			{
-				TWeakObjectPtr<APawn> WeakPawn = SpawnedPawn;
-				SpawnedPawn->GetWorldTimerManager().SetTimerForNextTick([WeakPawn]()
+				auto DisableAI = [](APawn* Pawn)
 				{
-					if (APawn* P = WeakPawn.Get())
+					if (!Pawn) return;
+					Pawn->SetActorTickEnabled(false);
+					if (AAIController* AIC = Cast<AAIController>(Pawn->GetController()))
 					{
-						if (AAIController* AIC = Cast<AAIController>(P->GetController()))
+						AIC->SetActorTickEnabled(false);
+						if (UBrainComponent* Brain = AIC->GetBrainComponent())
 						{
-							AIC->SetActorTickEnabled(false);
-							if (UBrainComponent* Brain = AIC->GetBrainComponent())
-							{
-								Brain->StopLogic(TEXT("PS_Editor"));
-							}
-							// Disable AI perception
-							P->SetActorTickEnabled(false);
+							Brain->StopLogic(TEXT("PS_Editor"));
 						}
 					}
+				};
+				DisableAI(SpawnedPawn);
+
+				TWeakObjectPtr<APawn> WeakPawn = SpawnedPawn;
+				SpawnedPawn->GetWorldTimerManager().SetTimerForNextTick([WeakPawn, DisableAI]()
+				{
+					DisableAI(WeakPawn.Get());
 				});
 			}
 		}

Unreal/Plugins/PS_Editor/Source/PS_Editor/Spline/PS_Editor_SplineActor.cpp

@@ -30,7 +30,10 @@ APS_Editor_SplineActor::APS_Editor_SplineActor()
 	SplineMeshComp->SetCollisionResponseToChannel(ECC_Camera, ECR_Block);
 	SplineMeshComp->bUseComplexAsSimpleCollision = true;
 	SplineMeshComp->SetCastShadow(false);
-	SplineMeshComp->SetRenderCustomDepth(true);
+	// Custom depth is OFF by default and only enabled while the spline is selected —
+	// otherwise any project-level outline PP material picks up every loaded spline as if
+	// it were selected. SetSelected() flips this on/off.
+	SplineMeshComp->SetRenderCustomDepth(false);
 	SplineMeshComp->SetCustomDepthStencilValue(2);
 
 	// Handle parent
@@ -427,7 +430,9 @@ void APS_Editor_SplineActor::SetSelected(bool bSelected)
 		{
 			SplineMeshComp->SetMaterial(0, Mat);
 		}
-		// Restore stencil 2 for occluded PP effect when deselected (selection sets it to 1)
+		// Only participate in the custom-depth pass while selected, so any project outline PP
+		// only highlights the selected spline (not every spline in the scene).
+		SplineMeshComp->SetRenderCustomDepth(bSelected);
 		SplineMeshComp->SetCustomDepthStencilValue(bSelected ? 1 : 2);
 	}
 
@@ -580,4 +585,12 @@ void APS_Editor_SplineActor::ImportFromCustomProperties(const TMap<FString, FStr
 		SplineTag = *TagStr;
 	}
 	UpdateSplineMaterials();
+
+	// After load, force the deselected visual state: handles default to visible on creation,
+	// and UpdateVisualization reads handle visibility to pick "selected vs. normal" material
+	// — so without this the line would render with the selected color until the user clicks
+	// the spline once.
+	SetHandlesVisible(false);
+	SetSelected(false);
+	UpdateVisualization();
 }

Unreal/Plugins/PS_Editor/Source/PS_Editor/Timeline/PS_Editor_TimelineSubsystem.cpp

@@ -54,28 +54,17 @@ void UPS_Editor_TimelineSubsystem::Tick(float DeltaTime)
 	}
 
 	CurrentTime += DeltaTime;
-	bool bReachedEnd = false;
 	if (CurrentTime >= Data.Duration)
 	{
+		// Natural end: clamp to the last frame and stop advancing. Values are left at
+		// whatever the last keyframe produced (no rewind), and simulation keeps running so
+		// the gameplay / editor scenario can continue unimpeded. Use Restart() to rewind
+		// and replay from the beginning.
 		CurrentTime = Data.Duration;
 		bIsPlaying = false;
-		bReachedEnd = true;
 	}
 
 	ApplyValuesAtTime(CurrentTime);
-
-	// Natural end of timeline: stop simulation as well (same contract as Pause button)
-	if (bReachedEnd)
-	{
-		if (APS_Editor_PlayerController* EditorPC = FindEditorPC(GetWorld()))
-		{
-			if (EditorPC->IsSimulating())
-			{
-				EditorPC->StopSimulation();
-			}
-		}
-	}
-
 	OnTimelineChanged.Broadcast();
 }
 
@@ -105,15 +94,20 @@ void UPS_Editor_TimelineSubsystem::Play()
 	}
 	bIsPlaying = true;
 
-	// Timeline and simulation are inherently linked: when we start the timeline in the runtime
-	// editor, make sure AI is enabled too. In pure gameplay, FindEditorPC returns null and we
-	// skip this (AI is already running through the normal game flow).
+	// Timeline and simulation are inherently linked: start simulation if it isn't running,
+	// or un-pause it if it was frozen by a previous Pause (keeping the actor transforms in
+	// place). In pure gameplay, FindEditorPC returns null so we skip — AI is driven by the
+	// normal game flow anyway.
 	if (APS_Editor_PlayerController* EditorPC = FindEditorPC(GetWorld()))
 	{
 		if (!EditorPC->IsSimulating())
 		{
 			EditorPC->StartSimulation();
 		}
+		else
+		{
+			EditorPC->SetSimulationPaused(false);
+		}
 	}
 
 	OnTimelineChanged.Broadcast();
@@ -121,14 +115,14 @@ void UPS_Editor_TimelineSubsystem::Play()
 
 void UPS_Editor_TimelineSubsystem::Pause()
 {
+	// Pause stops timeline advance AND freezes character movement (AI tick off, BT stopped)
+	// while keeping the pawns where they are — no transform restore, that's what Stop is for.
 	bIsPlaying = false;
-	// Pause also suspends the simulation so everything freezes coherently
-	// (positions are NOT restored — Stop is the way to reset).
 	if (APS_Editor_PlayerController* EditorPC = FindEditorPC(GetWorld()))
 	{
 		if (EditorPC->IsSimulating())
 		{
-			EditorPC->StopSimulation();
+			EditorPC->SetSimulationPaused(true);
 		}
 	}
 	OnTimelineChanged.Broadcast();
@@ -138,9 +132,11 @@ void UPS_Editor_TimelineSubsystem::Stop()
 {
 	bIsPlaying = false;
 	CurrentTime = 0.f;
+	LastAppliedValues.Empty();
+	LastAppliedValues.SetNum(Data.Tracks.Num());
 
-	// Stop simulation first (this restores saved transforms) so we're back to the pre-play state,
-	// then apply the values at t=0 to match the timeline start.
+	// Full reset: stop simulation (restores pre-play transforms) and apply t=0 values so
+	// the scene visually matches the timeline start.
 	if (APS_Editor_PlayerController* EditorPC = FindEditorPC(GetWorld()))
 	{
 		if (EditorPC->IsSimulating())
@@ -153,9 +149,24 @@ void UPS_Editor_TimelineSubsystem::Stop()
 	OnTimelineChanged.Broadcast();
 }
 
+void UPS_Editor_TimelineSubsystem::Restart()
+{
+	// Rewind + replay from the start. Done in two steps so simulation transforms are restored
+	// by Stop() before Play() re-enables AI, giving a clean "from the beginning" rerun.
+	Stop();
+	Play();
+}
+
 void UPS_Editor_TimelineSubsystem::Seek(float Time)
 {
 	CurrentTime = FMath::Clamp(Time, 0.f, Data.Duration);
+	// Invalidate the per-track value cache: the user may have edited properties manually
+	// between two seeks, so the actor's actual value can have drifted from what was last
+	// applied. Without this, a seek to a key whose stored value matches LastAppliedValues
+	// silently skips the write and leaves the manual edit visible — making every key
+	// "look like" it has the edited value until we seek to one with a different stored value.
+	LastAppliedValues.Empty();
+	LastAppliedValues.SetNum(Data.Tracks.Num());
 	ApplyValuesAtTime(CurrentTime);
 	OnTimelineChanged.Broadcast();
 }
@@ -216,6 +227,9 @@ bool UPS_Editor_TimelineSubsystem::AddOrUpdateKeyAtCurrentTime(AActor* Actor, co
 	const FGuid ActorId = GetOrCreateActorId(Actor);
 	if (!ActorId.IsValid()) return false;
 
+	UE_LOG(LogTemp, Log, TEXT("PS_Editor Timeline: AddOrUpdateKey — Actor=%s ActorId=%s Prop=%s CurrentTime=%.3f"),
+		*Actor->GetName(), *ActorId.ToString(), *PropertyPath.ToString(), CurrentTime);
+
 	// Resolve property to read current value
 	UObject* Target = nullptr;
 	FProperty* Prop = nullptr;

Unreal/Plugins/PS_Editor/Source/PS_Editor/Timeline/PS_Editor_TimelineSubsystem.h

@@ -49,14 +49,18 @@ public:
 	UFUNCTION(BlueprintCallable, Category = "ASTERION|PS_Editor|Timeline")
 	void Play();
 
-	/** Pause playback, keeping CurrentTime. */
+	/** Pause playback, keeping CurrentTime. Simulation keeps running. */
 	UFUNCTION(BlueprintCallable, Category = "ASTERION|PS_Editor|Timeline")
 	void Pause();
 
-	/** Pause playback and reset CurrentTime to 0. */
+	/** Pause playback, rewind to CurrentTime=0, stop simulation and apply t=0 values. */
 	UFUNCTION(BlueprintCallable, Category = "ASTERION|PS_Editor|Timeline")
 	void Stop();
 
+	/** Rewind to t=0 and immediately replay from the start (re-enables simulation). */
+	UFUNCTION(BlueprintCallable, Category = "ASTERION|PS_Editor|Timeline")
+	void Restart();
+
 	/** Jump to a specific time (seconds, clamped to [0, Duration]). Applies values immediately. */
 	UFUNCTION(BlueprintCallable, Category = "ASTERION|PS_Editor|Timeline")
 	void Seek(float Time);

Unreal/Plugins/PS_Editor/Source/PS_Editor/UI/Widgets/PS_Editor_MainWidget.cpp

@@ -33,6 +33,10 @@
 #include "PS_Editor_TimelineSubsystem.h"
 #include "Engine/World.h"
 
+// Forward declaration — the real definition lives further down with the timeline UI block,
+// but the toolbar Simulate button + NativeTick both need to look up the subsystem too.
+static UPS_Editor_TimelineSubsystem* GetTimelineSubsystemFromWidget(UPS_Editor_MainWidget* Widget);
+
 void UPS_Editor_MainWidget::SetSelectionManager(UPS_Editor_SelectionManager* InSelectionManager)
 {
 	SelectionManager = InSelectionManager;
@@ -905,18 +909,39 @@ TSharedRef<SWidget> UPS_Editor_MainWidget::BuildSceneButtons()
 				.Padding(4.0f, 0.0f, 0.0f, 0.0f)
 				[
 					SNew(SButton)
+					.ToolTipText(FText::FromString(TEXT("Start/stop simulation. If a timeline exists, also plays/pauses it in sync.")))
 					.OnClicked_Lambda([this]() -> FReply
 					{
 						APS_Editor_PlayerController* EditorPC = Cast<APS_Editor_PlayerController>(GetOwningPlayer());
 						if (!EditorPC) return FReply::Handled();
 
-						if (EditorPC->IsSimulating())
+						UPS_Editor_TimelineSubsystem* TS = GetTimelineSubsystemFromWidget(this);
+
+						// If there's a timeline with at least one track, route through the timeline
+						// so simulate + animation are always in lockstep (Simulate is effectively
+						// the Play/Pause button of the timeline).
+						if (TS && TS->GetNumTracks() > 0)
 						{
-							EditorPC->StopSimulation();
+							if (TS->IsPlaying())
+							{
+								TS->Pause();
+							}
+							else
+							{
+								TS->Play();
+							}
 						}
 						else
 						{
-							EditorPC->StartSimulation();
+							// No animation to sync with — just toggle simulation directly.
+							if (EditorPC->IsSimulating())
+							{
+								EditorPC->StopSimulation();
+							}
+							else
+							{
+								EditorPC->StartSimulation();
+							}
 						}
 						return FReply::Handled();
 					})
@@ -977,16 +1002,29 @@ TSharedRef<SWidget> UPS_Editor_MainWidget::BuildSceneButtons()
 
 							if (SceneSerializer.IsValid() && SpawnManager.IsValid())
 							{
-								// Sync BaseLevel sublevel only if scenario specifies a REAL base level.
-								// Scenes without a base level land in the "Unfiled" folder — GetSceneLevelName
-								// returns that as a placeholder but it isn't a loadable map, so skip.
+								// Same base-level sync logic as the scene-list click path:
+								// fall back to the MasterCatalog's default entry when the scenario
+								// has no base level; otherwise keep the current sublevel.
 								FString SceneLevelName = UPS_Editor_SceneLoader::GetSceneLevelName(FileName);
-								const bool bHasValidBaseLevel = !SceneLevelName.IsEmpty()
+								bool bHasValidBaseLevel = !SceneLevelName.IsEmpty()
 									&& SceneLevelName != TEXT("Unfiled")
 									&& BaseLevelPathMap.Contains(SceneLevelName);
-								if (bHasValidBaseLevel)
+								if (APS_Editor_PlayerController* EditorPC = Cast<APS_Editor_PlayerController>(GetOwningPlayer()))
 								{
-									if (APS_Editor_PlayerController* EditorPC = Cast<APS_Editor_PlayerController>(GetOwningPlayer()))
+									if (!bHasValidBaseLevel && EditorPC->MasterCatalogAsset)
+									{
+										for (const FPS_Editor_BaseLevelEntry& Entry : EditorPC->MasterCatalogAsset->BaseLevels)
+										{
+											if (Entry.bIsDefault && !Entry.DisplayName.IsEmpty())
+											{
+												SceneLevelName = Entry.DisplayName;
+												bHasValidBaseLevel = BaseLevelPathMap.Contains(SceneLevelName);
+												break;
+											}
+										}
+									}
+
+									if (bHasValidBaseLevel)
 									{
 										if (EditorPC->CurrentBaseLevel != SceneLevelName)
 										{
@@ -1010,9 +1048,9 @@ TSharedRef<SWidget> UPS_Editor_MainWidget::BuildSceneButtons()
 													break;
 												}
 											}
+										}
 									}
 								}
-							}
 
 								SceneSerializer->LoadScene(FileName, SpawnManager.Get());
 								bSceneDirty = false;
@@ -1119,10 +1157,12 @@ void UPS_Editor_MainWidget::NativeConstruct()
 	Super::NativeConstruct();
 	PopulateSpawnCatalog();
 
-	// Populate BaseLevel options from MasterCatalog
+	// Populate BaseLevel options from MasterCatalog.
+	// No hardcoded "None" entry: if the user wants an "empty" fallback they mark one of
+	// their catalog entries as the default (bIsDefault) — it appears in the popup like
+	// any other base level.
 	if (APS_Editor_PlayerController* EditorPC = Cast<APS_Editor_PlayerController>(GetOwningPlayer()))
 	{
-		BaseLevelOptions.Add(MakeShared<FString>(TEXT("None")));
 		if (UPS_Editor_MasterCatalog* Master = EditorPC->MasterCatalogAsset)
 		{
 			for (const FPS_Editor_BaseLevelEntry& Entry : Master->BaseLevels)
@@ -1251,17 +1291,41 @@ void UPS_Editor_MainWidget::PopulateSceneList()
 			{
 				if (SceneSerializer.IsValid() && SpawnManager.IsValid())
 				{
-					// Sync the BaseLevel sublevel only if scenario specifies a REAL base level.
-					// "Unfiled" is the folder for scenes saved without a base level — we keep the
-					// current sublevel as-is in that case rather than trying to load "Unfiled".
+					// Sync the BaseLevel sublevel to match the scenario being loaded.
+					// "Unfiled" is the folder for scenes saved without a base level — in that case
+					// we fall back to the MasterCatalog entry marked bIsDefault, or if none is
+					// defined we keep whatever sublevel is currently loaded.
 					FString SceneLevelName = UPS_Editor_SceneLoader::GetSceneLevelName(Name);
-					const bool bHasValidBaseLevel = !SceneLevelName.IsEmpty()
+					bool bHasValidBaseLevel = !SceneLevelName.IsEmpty()
 						&& SceneLevelName != TEXT("Unfiled")
 						&& BaseLevelPathMap.Contains(SceneLevelName);
-					if (bHasValidBaseLevel)
+
+					if (APS_Editor_PlayerController* EditorPC = Cast<APS_Editor_PlayerController>(GetOwningPlayer()))
 					{
-						if (APS_Editor_PlayerController* EditorPC = Cast<APS_Editor_PlayerController>(GetOwningPlayer()))
+						// No base level in the scenario file — try to resolve the default from the catalog.
+						if (!bHasValidBaseLevel && EditorPC->MasterCatalogAsset)
 						{
+							UE_LOG(LogTemp, Log, TEXT("PS_Editor: Scenario '%s' has no base level, searching for default in MasterCatalog (%d entries)"),
+								*Name, EditorPC->MasterCatalogAsset->BaseLevels.Num());
+							for (const FPS_Editor_BaseLevelEntry& Entry : EditorPC->MasterCatalogAsset->BaseLevels)
+							{
+								UE_LOG(LogTemp, Log, TEXT("  BaseLevel entry: DisplayName='%s', MapPath='%s', bIsDefault=%d"),
+									*Entry.DisplayName, *Entry.MapPath, Entry.bIsDefault ? 1 : 0);
+								if (Entry.bIsDefault && !Entry.DisplayName.IsEmpty())
+								{
+									SceneLevelName = Entry.DisplayName;
+									bHasValidBaseLevel = BaseLevelPathMap.Contains(SceneLevelName);
+									UE_LOG(LogTemp, Log, TEXT("  -> Picked default '%s' (in PathMap=%d)"),
+										*SceneLevelName, bHasValidBaseLevel ? 1 : 0);
+									break;
+								}
+							}
+						}
+
+						if (bHasValidBaseLevel)
+						{
+							UE_LOG(LogTemp, Log, TEXT("PS_Editor: Loading scenario '%s' with base level '%s' (current='%s')"),
+								*Name, *SceneLevelName, *EditorPC->CurrentBaseLevel);
 							if (EditorPC->CurrentBaseLevel != SceneLevelName)
 							{
 								FString SceneMapPath = SceneLevelName;
@@ -1283,6 +1347,8 @@ void UPS_Editor_MainWidget::PopulateSceneList()
 								}
 							}
 						}
+						// If still no valid base level and no default in the catalog, keep the
+						// current sublevel as-is — don't unload it (avoids empty scenes).
 					}
 
 					SceneSerializer->LoadScene(Name, SpawnManager.Get());
@@ -1457,7 +1523,16 @@ void UPS_Editor_MainWidget::PopulateSpawnCatalog()
 					}
 				}
 
-				Mgr->SpawnFromCatalog(EntryIndex);
+				// Spawn and immediately select the new actor exclusively — deselects
+				// whatever was active before, so the gizmo and property panel switch to it.
+				if (AActor* Spawned = Mgr->SpawnFromCatalog(EntryIndex))
+				{
+					if (UPS_Editor_SelectionManager* Sel = SelectionManager.Get())
+					{
+						Sel->ClearSelection();
+						Sel->SelectActor(Spawned);
+					}
+				}
 				bSceneDirty = true;
 				return FReply::Handled();
 			})
@@ -1491,12 +1566,19 @@ void UPS_Editor_MainWidget::NativeTick(const FGeometry& MyGeometry, float InDelt
 		}
 	}
 
-	// Update simulate button text
+	// Update simulate button text / color. Keep the label "Simulate" / "Stop" regardless of
+	// the timeline state so it doesn't clash with the dedicated Play button in the timeline
+	// panel — a second "Play" on the toolbar was confusing. The button still drives the
+	// timeline under the hood (see BuildToolbar lambda).
 	if (SimulateButtonText.IsValid())
 	{
 		if (APS_Editor_PlayerController* SimPC = Cast<APS_Editor_PlayerController>(GetOwningPlayer()))
 		{
-			if (SimPC->IsSimulating())
+			UPS_Editor_TimelineSubsystem* TS = GetTimelineSubsystemFromWidget(this);
+			const bool bTimelinePlaying = TS && TS->GetNumTracks() > 0 && TS->IsPlaying();
+			const bool bActive = SimPC->IsSimulating() || bTimelinePlaying;
+
+			if (bActive)
 			{
 				SimulateButtonText->SetText(FText::FromString(TEXT("Stop")));
 				SimulateButtonText->SetColorAndOpacity(FLinearColor(1.0f, 0.3f, 0.2f));
@@ -3105,6 +3187,26 @@ TSharedRef<SWidget> UPS_Editor_MainWidget::BuildTimelinePanel()
 				+ SHorizontalBox::Slot().AutoWidth().Padding(4.0f, 0.0f, 0.0f, 0.0f).VAlign(VAlign_Center)
 				[
 					SNew(SButton)
+					.ToolTipText(FText::FromString(TEXT("Rewind to t=0 and replay from the start")))
+					.OnClicked_Lambda([this]() -> FReply
+					{
+						if (UPS_Editor_TimelineSubsystem* TS = GetTimelineSubsystemFromWidget(this))
+						{
+							TS->Restart();
+						}
+						return FReply::Handled();
+					})
+					[
+						SNew(STextBlock)
+						.Text(FText::FromString(TEXT("Restart")))
+						.Font(Bold)
+						.ColorAndOpacity(FLinearColor(0.6f, 0.8f, 1.0f))
+					]
+				]
+				+ SHorizontalBox::Slot().AutoWidth().Padding(4.0f, 0.0f, 0.0f, 0.0f).VAlign(VAlign_Center)
+				[
+					SNew(SButton)
+					.ToolTipText(FText::FromString(TEXT("Stop: rewind + restore actor transforms")))
 					.OnClicked_Lambda([this]() -> FReply
 					{
 						if (UPS_Editor_TimelineSubsystem* TS = GetTimelineSubsystemFromWidget(this))
@@ -3300,7 +3402,10 @@ void UPS_Editor_MainWidget::RebuildTimelineTracksList()
 		for (int32 KeyIdx = 0; KeyIdx < Track.Keys.Num(); ++KeyIdx)
 		{
 			const FPS_Editor_TimelineKey& Key = Track.Keys[KeyIdx];
-			const FLinearColor BaseDotColor = Key.bInterpolate ? FLinearColor(0.4f, 0.8f, 1.0f) : FLinearColor(1.0f, 0.8f, 0.3f);
+			// Saturated base colors so the dots pop against the dark track.
+			const FLinearColor BaseDotColor = Key.bInterpolate
+				? FLinearColor(0.0f, 0.6f, 1.0f)     // vivid blue = interpolated
+				: FLinearColor(1.0f, 0.5f, 0.0f);    // vivid orange = stepped
 			const int32 CapturedKey = KeyIdx;
 			const int32 CapturedTrack = TrackIdx;
 			const bool bKeyInterp = Key.bInterpolate;
@@ -3325,14 +3430,14 @@ void UPS_Editor_MainWidget::RebuildTimelineTracksList()
 					.VisualTimeRef(VisualTime)
 					.DotColor_Lambda([this, CapturedTrack, CapturedKey, BaseDotColor]() -> FSlateColor
 					{
-						// Priority 1: selected by the user (click) — white
+						// Priority 1: selected by the user (click) — bright yellow
 						if (SelectedTimelineTrackIdx == CapturedTrack && SelectedTimelineKeyIdx == CapturedKey)
 						{
-							return FSlateColor(FLinearColor(1.0f, 1.0f, 1.0f));
+							return FSlateColor(FLinearColor(1.0f, 1.0f, 0.0f));
 						}
 
 						// Priority 2: "active" — the last key whose time is <= CurrentTime for this track.
-						// That's the key currently providing the base value during playback/scrub. Green.
+						// That's the key currently providing the base value during playback/scrub.
 						if (UPS_Editor_TimelineSubsystem* TS2 = GetTimelineSubsystemFromWidget(const_cast<UPS_Editor_MainWidget*>(this)))
 						{
 							if (TS2->GetTracks().IsValidIndex(CapturedTrack))
@@ -3348,13 +3453,13 @@ void UPS_Editor_MainWidget::RebuildTimelineTracksList()
 									}
 									if (ActiveIdx == CapturedKey)
 									{
-										return FSlateColor(FLinearColor(0.3f, 1.0f, 0.3f));
+										return FSlateColor(FLinearColor(0.0f, 1.0f, 0.0f)); // pure green
 									}
 								}
 							}
 						}
 
-						// Priority 3: base color (blue for interp, orange for step)
+						// Priority 3: base color (vivid blue for interp, vivid orange for step)
 						return FSlateColor(BaseDotColor);
 					})
 					.ToolTipText(FText::FromString(FString::Printf(TEXT("t=%.2fs %s — click to select/seek, drag to move, Del to delete"), Key.Time, bKeyInterp ? TEXT("(interp)") : TEXT("(step)"))))
@@ -3370,11 +3475,17 @@ void UPS_Editor_MainWidget::RebuildTimelineTracksList()
 						SelectedTimelineTrackIdx = CapturedTrack;
 						SelectedTimelineKeyIdx = CapturedKey;
 
-						// Select the animated actor so the property panel shows matching values
-						if (AActor* TrackActor = TS2->FindActorById(Tr.ActorId))
+						// Select the animated actor exclusively — ClearSelection first so any
+						// previously-selected actor (e.g. a spline still in overlay-visible state)
+						// is properly released and its handles/highlight go away.
+						AActor* TrackActor = TS2->FindActorById(Tr.ActorId);
+						UE_LOG(LogTemp, Log, TEXT("PS_Editor: Key click — track=%d key=%d ActorId=%s resolved=%s"),
+							CapturedTrack, CapturedKey, *Tr.ActorId.ToString(), TrackActor ? *TrackActor->GetName() : TEXT("null"));
+						if (TrackActor)
 						{
 							if (UPS_Editor_SelectionManager* Sel = SelectionManager.Get())
 							{
+								Sel->ClearSelection();
 								Sel->SelectActor(TrackActor);
 							}
 						}