After the latest Sonos update (16.1) my rear surrounds and sub mini were disconnected and I cannot get them reconnected and working again (my beam has been unaffected somehow?). Sometimes it finds them and says they're connected but they don't work and then disconnect almost immediately. Sometimes it just will not find them at all. I've tried all the ideas suggested in app, disconnecting the power adapters, rebooting the router etc. I also have tried reinstalling the app and setting up as a new system but nothing seems to solve it. I even tried rolling back to the previous version of the app but it wouldn't let me connect any new devices without updating it! I'm sort of out of ideas now
System: 2x One SL rear speakers, sub mini, beam gen1. Connected by eArc to LG B2 TV