I found the culprit, at least on my headset. There is an option in sound
settings called Mute Microphone. My headset went back to casting sound
just fine upon setting that option to off. Meta devs, you may want to
consider renaming this option, as it...
I'm in exact same boat here. Quest 2 got an update a few weeks ago, and
now it won't cast sound to Chromecast. This is frustrating, it takes
away a lot from the experience, especially in titles that depend on
sound, like Beatsaber. Come on, Meta, rea...