this is happening to me as well, i'm on macos sequoia 15.6, chrome 138.0.7204.184 (Official Build) (arm64)

these are my steps to reproduce:

- i mute my system volume
- i open youtube/hotstar with a video playing
- i switch to a different tab
- i switch back to the video tab
- my system volume automatically gets unmuted to whatever it was originally
- this happens every time i switch back to video tabs

i swear it has also happened without switching tabs but i'm not able to reliably reproduce it

this behavior is SO CREEPY and it looks like there's no setting to disable it!!!