Got it, and thanks for sharing, this actually gives good clarity. Since everything is 200 OK and the end-of-call-report is coming through but empty, it’s likely not a webhook issue but that recording/transcription isn’t being triggered on the assistant side.
I’d double-check your assistant settings, make sure recording, transcriber, and any analysis/structured outputs are properly enabled, and that the call isn’t ending too quickly at the SIP level.
Also worth checking if anything changed recently in your assistant or number routing config.
If you want, I can jump in with you directly and pinpoint this quickly, I’ve seen this exact pattern before. Kindly let's discuss more privately. @muratsk