Sounds like a potential duplicate IP address issue, at the very least, I’d unplug all Sonos devices from power, then reboot your Eero system. Give it at least 5 minutes to recover before plugging back in your Sonos devices.
And if that doesn’t work, submit a system diagnostic and call Sonos Support to discuss it.
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 phone folks, they have tools at their disposal that will allow them to give you advice specific to your Sonos system and network.
Never reset your devices in this case. Just reboot your router and, if required, reboot your devices.
Have you followed the official Sonos advice for configuring your Eero?