AVSampleBufferAudioRenderer's set isMuted and volume doesn't work on AirPlay

The isMuted and volume are used to set volumes of player.
I tried to mute audio playing by setting isMuted to true and volume to 0.0. it doesn't work when the HomePod is the audio output device using AirPlay, but if it works on iPhone speaker output.
How should I mute the audio when using AirPlay device as audio output?
Please file a bug report using the feedback assistant and make sure to describe your use case.
AVSampleBufferAudioRenderer's set isMuted and volume doesn't work on AirPlay
 
 
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