Why do i receive a "call terminated" event for calls that are still ongoing?

Hi O.o,

Thank you for posting your question in the Microsoft Q&A forum. 

Based on your description, it appears you are experiencing an unexpected behavior where your bot receives a CallState.Terminated event after the first participant leaves the meeting (without ending it), followed by a ParticipantsOnUpdated event indicating all participants have left even though the meeting is still active and other participants remain.

I have reviewed available documentation and searched for similar reports but could not find any official confirmation related to this behavior. Unfortunately, as a forum moderator, I have limited resources and no access to an environment to reproduce this scenario, so I cannot conclusively determine whether this is a product issue.

If this behavior only started recently and your bot implementation worked as expected before, I highly recommend submitting a support ticket via the Azure portal. A support engineer can collect logs and investigate this in depth.

However, I have tried to find some potential workarounds you might consider while waiting for a support agent to reach out:

• Check ResultInfo when receiving the CallState.Terminated event: This can help confirm whether the termination was due to a normal disconnect or another issue.
• Verify meeting state or participant list before disposing the bot: If the meeting is still active, consider implementing logic to rejoin the meeting using the joinWebUrl or meetingId.

I hope these suggestions are helpful. If you have any further questions, please feel free to share.

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