fix: empty transcript blocks commit_user_turn until timeout#5429
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When using manual turn detection, commit_user_turn waits for _final_transcript_received to be set. If the STT returns a final transcript with empty text (e.g. silence), the event was never set because the empty check returned early, causing commit_user_turn to block until transcript_timeout. Move _final_transcript_received.set() before the empty transcript guard so the wait is unblocked regardless of transcript content.
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davidzhao
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Apr 13, 2026
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osimhi213
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Apr 15, 2026
* upstream/main: (31 commits) chore: reduce renovate noise (livekit#5421) Rename e2ee to encryption in JobContext.connect (livekit#5454) feat: add Runway Characters avatar plugin (livekit#5355) Fix FrameProcessor lifecycle for selector based noise cancellation (livekit#5433) Feature - Configurable session close transcript timeout (livekit#5328) add ToolSearchToolset and ToolProxyToolset for dynamic tool discovery (livekit#5140) feat(beta/workflows): add InstructionParts for modular instruction customization (livekit#5077) fix: allow multiple AsyncToolsets by deduplicating management tools (livekit#5369) fix: empty transcript blocks commit_user_turn until timeout (livekit#5429) Feature/krisp viva sdk support (livekit#4370) feat: add service_tier parameter to Responses API LLM (livekit#5346) fix(inworld): do not leak connections when when cancelled (livekit#5427) update: Sarvam STT - add verbose error loggin and remove retry connection (livekit#5373) chore(deps): update github workflows (major) (livekit#5424) (azure openai): ensure gpt-realtime-1.5 compatibility (livekit#5407) chore(deps): update dependency nltk to v3.9.4 [security] (livekit#5418) chore(deps): update dependency aiohttp to v3.13.4 [security] (livekit#5416) chore(deps): update dependency langchain-core to v1.2.28 [security] (livekit#5417) chore: pin GHA by commit (livekit#5415) fix(aws): unwrap doubly-encoded JSON tool arguments from Nova Sonic (livekit#5411) ...
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Summary
commit_user_turnwaits for_final_transcript_receivedto be set after flushing the STT buffer with silenceFINAL_TRANSCRIPTwith empty text (e.g. the user turn was silence),_on_stt_eventreturned early before setting the event, causingcommit_user_turnto block untiltranscript_timeout_final_transcript_received.set()before the empty transcript guard so the wait unblocks regardless of transcript content