So, I’m guessing that last update to the desktop controller and related firmware - especially the firmware has created a new bug for me where speakers/zones just vanish from the app - any app and stop playing. Sometimes they are still there but no sound. I’m guessing the speaker either crashes or somehow loses connection or becomes a zombie - even wired connections, so it’s not a WiFi issue. Most of my Sonos is wired.
This has been such a bummer experience. Lots of money into this system and SONOS couldn’t care less.