I have had an issue with Sonos crashing my network when I removed the Bridge and used hardwired a speaker instead. I did a little research and back then there was a Cisco engineer who wanted to have a large Sonos system that was fully wired. I followed his configuration and everything worked!
Sonos adopted his configuration and its is a simplified version on their support site.
I have also had Universal Remote Control (URC) DMS audio in my home. They make a MAC filtering switch specifically for their amps, because without it their amps will also crash your network.
Does Sonos need to make a switch? I don’t think so. If your settings are correct, your system should run fine without bringing down your network.
You may find this page helpful:
https://github.com/IngmarStein/unifi-sonos-doc