UE5 limits replicated TArrays to 65535 elements. ElevenLabs sends audio chunks up to ~72K bytes, exceeding this limit when sent as raw PCM. Split into 32000-byte sub-chunks (1s of 16kHz 16-bit mono) before calling MulticastReceiveAgentAudio. Co-Authored-By: Claude Opus 4.6 <noreply@anthropic.com>