That’s a pretty good indicator of some wifi interference , or even a duplicate IP address issue. Beyond reading the linked FAQ, and implementing any fixes that may be applicable, I would unplug all your Sonos devices from power, then reboot your router. Give the router a couple of minutes to come back up before plugging your Sonos back in.

If that process does indeed fix the issue, I would encourage you to look at your router’s manual, and set up reserved IP addresses in the router’s DHCP table. Any router that has gotten in that odd state once could do so again, reserving IPs at least for your Sonos would help guard against that issue happening again.