I've got a stereo pair of PLAY:1 speakers and have them set to play a streaming radio station every morning to wake me up. This morning they were out of sync and the sound was echoing. I stopped and started playback a few times (via the button on the top of the SONOS) and this didn't fix the issue.
I unplugged both speakers from power and then plugged them back in again and this seemed to resolve the issue.
I have submitted diagnostics before I power cycled the speakers - the number is 1782446824
Best answer by Keith N
Hi there, kai_h. Thanks for posting and sharing your diagnostic number. When I take a closer look at the Master Bedroom speakers, it looks like the problem is a failure sending and receiving UPnP commands. It seems that you have both Left and Right Family Room speakers plugged into the network with an Ethernet cable. Can you tell us a little more about how Sonos is plugged into the network? Are they plugged in through a switch or access point?
The more information we have about the network the better we can advise on next steps.