I have 5 Sonos speakers distributed throughout house. Since the last update, each time I turn on Sonos, only the Arc in basement shows as ON and always playing the same song. It takes 2-3 times turning it off and turning on all the others (3 Ones and 1 Move2) before it takes. Meanwhile, the screen continues to show that song that is ready to play on the Arc even as the other speakers cycle through dozens of other songs. The app NEVER changes the song shown as playing.
Sonos also randomly shuts off a speaker or two and has to be turned back on. Or the whole system just stops playing.