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fyi) This issue is more well reproducible on the background or lockscreen state. ### Reproducible way : first call (works well) 1. Receiving incomming call with callKit, and the provider delegate of callKit `*func* provider(_didActivate)` notify that audioSession was successfully activated. 2. end the call,

*func* provider(_:didDeactivate:)

notify deactivate audiosession successfully Second call (error) - enter background or lock screen for more easy reproduction 1. When receiving the incomming call with callKit, the delegate doesn’t notify. and ongoing call has no audio connectivity. (Callkit failed activating audioSession, I think.) 2. (additional info) The room connection has been established, the local participant has local track, and is receiving dataChannel data. 3. end the call, doesn’t notify either. ### v1.0.9 I was previously using version 1.0.9 and didn’t have this issue. I have just tried to reproduce it for testing and it is reproducible.

Hey @hundreds-orange-8321, we'd definitely want to track this one down. I think the tricky thing is repro.. is this only reproducible when using callkit? are you able to reproduce it in another way? another thing that would be helpful is trying to see what is the first version of the SDK that it would break with. if it's not to difficult, could you also try 1.0.10, etc? then we can isolate it to a smaller number of commits.

@dry-elephant-14928 Thanks for reply, first : I think this is callkit related issue. and this only reproducible on the background (or lockscreen) state. second : I’ll test other versions, and let me know you soon.