Scott you will find another couple of thread’s here for the same issue, you might well want to read through those. The Roon support team are in these threads as well
It’s great to see you on the Roon Community! You have my sincerest apologies for the delayed response here, we’ve been dealing with a higher-than-usual volume following our release and we’re working as quickly as we can to get back to everyone.
Following up on this thread, our team is investigating this issue deeper. In the meantime, if you could please reproduce the issue, note the time + date when the Sonos disappeared, reboot your core, and then send over a set of manual logs? Please use the directions found here and send over a set of logs to our File Uploader.