AUGraphStart crashes on simulator below iOS 14

[iamszabo]

Both the example app and our app crashes under simulator below iOS 14 (so only iOS 14 simulator works) since Big Sur.

It seems that once they fixed to avoid crashing on iOS 14 #453 it started to crash on the simulators.
There is also a Thread on Apple forums https://developer.apple.com/forums/thread/667921

2021-06-15 09:31:19.245892+0100 ExampleApp[72627:4435895] 239: CA_UISoundClientBase::StartPlaying: AddRunningClient failed (status = -66681).
2021-06-15 09:31:19.352905+0100 ExampleApp[72627:4435728] Slider Changed: 0.000000
2021-06-15 09:31:35.521689+0100 ExampleApp[72627:4435728] setDataSource:withQueueItemId: Playing: http://www.abstractpath.com/files/audiosamples/sample.mp3
2021-06-15 09:31:35.639445+0100 ExampleApp[72627:4435950] setCurrentlyReadingEntry:andStartPlaying:clearQueue: http://www.abstractpath.com/files/audiosamples/sample.mp3
2021-06-15 09:31:35.889586+0100 ExampleApp[72627:4435950] processFinishPlayingIfAnyAndPlayingNext:withNext: Finished: nothing, Next: http://www.abstractpath.com/files/audiosamples/sample.mp3, buffering.count=0,upcoming.count=0
2021-06-15 09:31:36.527620+0100 ExampleApp[72627:4436997] [AudioHAL_Client] HALB_IOBufferManager.cpp:226:GetIOBuffer:  HALB_IOBufferManager::GetIOBuffer: the stream index is out of range
2021-06-15 09:31:36.527789+0100 ExampleApp[72627:4436997] [AudioHAL_Client] HALB_IOBufferManager.cpp:226:GetIOBuffer:  HALB_IOBufferManager::GetIOBuffer: the stream index is out of range
2021-06-15 09:31:36.539061+0100 ExampleApp[72627:4436997] [aqme] 254: AQDefaultDevice (1): output stream 0: null buffer
2021-06-15 09:31:36.539329+0100 ExampleApp[72627:4436997] [aqme] 1640: EXCEPTION thrown (-50): -
2021-06-15 09:31:44.890548+0100 ExampleApp[72627:4435950] RPCTimeout.mm:55:_ReportRPCTimeout: Start: Mach message timeout. Apparently deadlocked. Aborting now.```

[iDevelopper]

Apple bug...