Can see speakers but sometimes can't connect to some, not always the same speakers. If connected, control is intermittent, such as next track stops working for 10 minutes or so, then does. Grouping listed speakers works sometimes, doesn't other times, some will add to group some won't, different speakers at different times. Sometimes no problem, sometimes shows as grouped and then will ungroup. Volume control sometimes works sometimes doesn't. Playback sometimes just stops, sometimes jumps to next track. Problems seen in both Sonos app and Spotify. I'm on 100MB broadband connection. Using S1 app, with obsoleted play 5, and a playbar (with Ethernet cable) and play 3 that managed to survive the cull. Issues becoming progressively worse, started just over a year ago when Sonos started pressing me to brick and buy again.
Best answer by ovemalmqvist
I got help from Sonos support and i had to change the master of my groupie from Play5 to Play1. The memory in Play5 was too small.