My Arc/Sub 1/rear Ones system used to work fine but now I can’t connect the rears. I’ve reset Ones and tried the suggestions in related posts. I was able to get the rears going without the rest of the system, but when I remove then Set Up Surrounds they won't play. Once they played for a second and then quit. They automatically assume the identity of Living Room 2 and Living Room 3, while they should both be subsumed in my Living Room (+Sub, Arc) system.
The Ones, Five (new), and Beam 1 in other rooms work fine. I’ve had Sonos for years and have always been able to trouble shoot problems, but I’m at the end on this one.