@apanda @And0Austria @barbaramartina I noticed now the app (before crashing) raises a AVAudioSessionRouteChangeNotification with "AVAudioSessionRouteChangeReasonUnknown". I looked at the documentation but cannot find any suggestion on how to handle this... assuming this is linked to the crash Did you notice the same behaviour before the crashes?

@loryrad I cannot really reproduce it. Now only happens when back from background, so I do launch the app, then sent it in background. I then use my phone for anything else (including listen to music as I think might be part of the problem) and every now and then I launch the app and it crashes.

@CrunchyBagel yes I do recreate it when back from background and I'm actually having the app saying "Voice on" once in foreground to "warm it up", but cannot do the same when recreating it after "x" times, but I'm OK with the delay, not really noticeable.