Active Speaker keeps changing even the microphone is mute but unmute on the zoom application

[sairah016]

Is there anyone who also encounters the active speaker keeps changing when the zoom  mic is on unmute even the microphone on the audio system was on mute. 

[ZoomTestKitchen]

I can't say that I have experienced this behavior. Were you able to confirm visually that all the microphones displayed in the participant list indicated that they were muted, except of course the one (single) speaker?