The barge-in cancellation challenge is real — we've found that tracking the exact timing of when Twilio's media stream sends the interrupt signal vs when ElevenLabs actually stops generating is the key to isolating whether it's a network, provider, or orchestration-layer issue. Have you tried correlating Twilio's call event timestamps with ElevenLabs' generation logs?

I built something that automates exactly this kind of cross-provider investigation across Twilio + ElevenLabs + Deepgram — happy to share if you want