I have a sonos bridge and 2 sonos 1. Every now an then the music stops playing and when I look in the sonos app it can only find one of my players. I connect the other one and group them again. I start the music and 5 min. later the music stops again. I have tried to reboot everything - the players, the bridge, my router, my modem - everything. It is also happening with only one of the players playing. It used to work fine, but has changed to this overnight. I have tried to change my Sonos to channel 11 and router to channel 1, moved my bridge away from my router. But it din't help. What to do?