I have seen several similar descriptions involving a particular device or service. My experience has been with all of my devices. I usually run my Sonos system as a single group. As I move from room to room, the music is the same. I have found no pattern to the problem I am experiencing. It has happened when I’m playing “My Music” and when listening to SiriusXM. At the times it has happened, I have not been making adjustments or using apps for Sonos. Suddenly, music stops. On investigation, I find all devices have volume level set to zero. I can correct the settings from my Android or IOS app, and everything works until it happens again.
I will say that I do not recall this happening prior to the attempt to make Sonos unusable by replacing the supporting apps with garbage.