Hello Gentlemen,
I’ve had this problem as well. I’ve worked extensively with Roon to get them to look at it, after eliminating assigning the blame to my network/system, they’ve moved the problem to have QA look at it. It’s been a while and there’s been no progress. There is most definitely an issue. I’ve resorted to just using the BlueOS app (which works fine) as the problem is too frequent to just be a minor annoyance. I do hope they will work on it, it’s easy to reproduce. Here is a link to my discussion with @support:
Roon Losing Connection to Bluesound
Also, I noted that this morning BlueSound released new firmware, there are no release notes up and I’ve not had time to see if anything has changed.
Good luck to us all!