I can't turn off voice chat

I have these settings, yet I can still hear someone speaking from time to time. There's also this mute icon next to my name at all times. Anyone knows anything ?

https://preview.redd.it/04ajsri6ogcd1.png?width=182&format=png&auto=webp&s=3a4b2e3bf160bae2e03b52e02a6503cc792f55eb

https://preview.redd.it/zpx6pvwwngcd1.png?width=1029&format=png&auto=webp&s=1cefe810d7bca4466ac9e7c6db395d332336a8de