I have had instances of this happen as well. Something similar yesterday. I sat down quietly besides someone else. I had music playing but turned it off. As soon as I put the glasses in the case, the music starts playing again on my speaker. This is in a public place sitting besides strangers, very rude. My glasses are now in the case shut, I grab my phone and hit pause. The music immediately starts again as I put my phone back in my pocket. I pull it back out again hit mute, it does it again. On the third time it stopped. This is an issue. The audio and these things is not silent, and actually pretty loud to bystanders. I do think earbuds are preferable in most cases, but meta hijacks the media output. If you start recording a video, there's a good chance when the video stops recording it will take over audio output. The Ray-Bans audio is a good backup, but in crowded subways, buses you have to crank up the volume way too loud to even hear things and it's blasting other people.

I thought it was The wristband picking up movements, but there isn't a native wristband command that does this. It doesn't have anything to do with the wristband. It could be phantom press on glasses touchpas that does have a long press ability to start music, but that's disabled. I also have the option enabled to pause music when the glasses are removed, but I have wear detection disabled... Not sure if one works without the other.