I'm seeing some strange behaviour with Signal and Vanadium apps on my Pixel 6 that's running latest stable version (though it started appearing about a month ago).
It seems that the green indicator showing microphone use it almost always on for Signal. I don't have Google Play Store, I'm aware that Signal is always active in the background, and yet it only started behaving like this about a month ago.
Additionally, today I've temporarily granted Vanadium access to microphone and camera, and then removed those permissions. Buf if the microphone is enabled system-wide, even if microphone permission is removed for Vanadium, the green dot indicator is still on.
https://imgur.com/a/qJZebsw