Had my Sonos for years now and never had a problem.
Since adding the new play 5 a few months back, I randomly lose a room from the controller but it still plays music but drops it's grouping.
Problem I'm having now is I keep losing my grouping but the speaker remains in the list.
Play 5 is ethernet, playbar +sub is ethernet, play 1s are wireless, bridge is ethernet.
Diagnostic number is 7413992
Thanks in advance