The speech path forced FINAL_ONLY for Qwen3-TTS deployments without async chunks, so a talker-only server emitted one engine output per request and all codec frames arrived at once (measured: 1 engine output per request, first codes at output #1). A talker-only stage (final_output + latent) now keeps DELTA outputs so codec frames stream per step. Co-Authored-By: Claude Fable 5.1 <noreply@anthropic.com>