Wrong Deactivate audio session event was received when Ending cellular call

Hi All

I recently found that wrong deactivate audio session event was received on app when user end Celluar call.

Here is my step:

1. App report to CallKit an incoming call and answer it.
2. Device receive Celluar call, and user choose Hold/Accept.
3. and app is notified by held action on Call Provider delegate.
4. User end Celluar call.

Expected : app is supposed to receive activate Audio session or unheld event

Real result: app receive did deactivate event. which cause app to shut audio session.

Can anyone correct on this scenario?

Thanks,