Also got 26x 401 Unauthorized on transcript webhooks on one call, even though status update and tool calls webhooks on the same URL with the same HMAC secret delivered fine in the same call. Looks like the transcript webhook auth path is different when the transcriber is ElevenLabs vs Deepgram. Net: unusable for phone reception where turn taking matters. Rolled back to Deepgram Nova 3 same day. Curious if anyone else has it working for live inbound or if it's really just an async/post call transcriber.