The App to be working okay here and Roam/Roam 2 are registered & working - maybe check the Sonos System Requirements & those required for the App too just in case your device is running an unsupported OS version.

https://support.sonos.com/en-us/article/sonos-app-requirements

https://support.sonos.com/en-us/article/sonos-system-requirements

If the issues persist then it maybe best to reproduce the issue(s) seen and then immediately submit a Sonos system diagnostic report from within the Sonos App (if practical), note it’s reference and contact/chat with Sonos Support Staff via this LINK and see what the Staff can perhaps suggest to help you to resolve the matter.