Unfortunately, Sonos support doesn’t monitor this community forum, only Sonos Forum Moderators. And we in the community can’t accessdiagnostics. Your best bet would be to call Sonos Support directly to discuss it.

When you speak directly to the phone folks, they have tools at their disposal that will allow them to give you advice specific to your network and Sonos system.

 If I were to guess, it is likely either simple wifi interference , or a duplicate IP address issue caused in your router. If the information in the linked FAQ doesn’t help, try unplugging al, your Sonos devices from power, then reboot your router. Wait a couple of minutes for your router to come back up, then plug in your Sonos. 

Thanks Bruce - I'd seen Sonos reps respond previously , but will reach out directly. thanks again.

There’s a 50/50 chance that a Forum moderator will see it and respond. There’s a 100% chance that if you call in, you’ll get a response ;)