I can't get speechDuration of SFSpeechRecognitionResult in test flight.

I am building an application using SFSpeechRecognizer, but I cannot get the following parameter as a response. (which will be 0). SFSpeechRecognitionResult.speechRecognitionMetadata(SFSpeechRecognitionMetadata).speechDuration

Although it can be obtained in the actual device confirmation in development, it cannot be obtained in the test flight version of the application. Does anyone else have a similar issue?

I can't get speechDuration of SFSpeechRecognitionResult in test flight.
 
 
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