To whom it may concern.
I changed to a complete Unifi network 1 year ago with UDM pro, several switches and access points (Ac-Pro). My Sonos has been a complete nightmare ever since with audio drop outs and instability in general. (I hardwired one Sonos port hence implementing Sonos net for the entire system (2 Ports and 7 Sonos one)
Following suggestions from the internet, I tried several configuration changes to the Unifi network, but I never managed to find a solution which solved my issues.
this weekend I tried to change my Sonos system to “Wireless” as defined by Sonos, i.e. no speaker is hooked up by Ethernet cable. This is doable for me since I have execellent wifi coverage to all speakers.
Well case closed, all issues solved!!
I just wish I had done this Long time ago, would have save me a lot of trouble and frustration.
Please note that You may need to reset each speaker and re-add to system to switch to wireless (I had to). Beware You might loose your playlists if you reset all speakers at once. I changed one at the time and did not loose my lists.
br and good luck