The system API Audioengine gets the input node crashed in iOS14 but not iOS13.

I update the Xcode12-beta and run the project with it. Then the Audioengine gets the input node crashed.

AVAudioInputNode *inputNode = self.audioEngine.inputNode

Crashed.
The system API Audioengine gets the input node crashed in iOS14 but not iOS13.
 
 
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