We have 10 Sonos speakers and have them grouped for different rooms. However these hardly ever work properly even though we follow instructions and go into groups, create and apply. We ask Alexa to play a certain group and it misses some speakers or adds them on. We are so frustrated with the set up we are considering taking g the whole system out and goingvback to our original system which was Bose
Conversely, it’s certainly possible that some members of your ‘group’ aren’t reachable by your network at the moment of execution of the command. Have you performed a simple network refresh by unplugging all the Sonos from power, rebooting your router, and waiting two minutes before plugging back in your Sonos?
I’d also be tempted to submit a system diagnostic within 10 minutes of experiencing this problem, and call Sonos Support to discuss it. Don’t post the resulting diagnostic number here, they get sensitive about GDPR.
There may be information included in the diagnostic that will help Sonos pinpoint the issue and help you find a solution.
When you speak directly to the Support staff, they have tools at their disposal that will allow them to give you advice specific to your network and Sonos system.
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