I can't believe I am having the exact same issues I had with my Samsung s19 as with the S21! When I record a video either directly through the camera app or third party such as Instagram/Snapchat the camera switches (in the middle of the video recording) microphones and causes the video to have muted sound.
What happens is, 10 sec in or something the audio recording becomes muffled, and when I had looked into the issue during my ownership of the Samsung s19, the issue was that it keeps switching between the 2 microphones and causes the whole audio to be muted.
How is this still an issue 2 models after?!!
