I’m having the same issue. Yesterday Sonos seemed to stop working. I did all the normal trouble shooting, rebooting devices, router APs etc. If I reboot the ST Hubv3 the speakers will work for about 15 minutes, then stop. When I look at the Sonos devices in the ST app and check the driver, I see the driver version updated to version 2025-6-02T20:50:12.11244068. Checking the GitHub for the Smartthings Edge drivers I see there were changes made to the Sonos drive 2-4 days ago. I now see there is a new firmware rolling out: Aeotec Smart Home Hub/2018/2015 Model Hub Firmware Release Notes - 0.57.13
I don’t have this version, my version is 56.11.
I’m thinking I got the new driver, and not the new firmware so things are broken. I hope I get the new firmware and things go back to normal.