Deepgram has resolved the issue, and we're seeing calls go through fine. We will be closely monitoring the issue. We highly recommend setting up transcriber fallbacks to avoid call failures in situations like this.
https://docs.vapi.ai/api-reference/assistants/create#request.body.transcriber.DeepgramTranscriber.fallbackPlan

We're noticing some calls failing with issues with the deepgram transcriber, we're actively monitoring it. In the meantime, we recommend switching to a different transcriber and setting up Transcriber Fallbacks to prevent calls from failing.