Hi John, thanks for the update. Mesh networks in my experience can cause a few problem for some software (including Roon) when the wireless device switches between nodes.
You don’t mention the number of nodes but the first check would be to switch off or disable any nodes other than the primary and check if the problem persists.
FTR.
There are also a number of reports (example) where the client is losing communication with the server which, I believe, is being investigated. I have also had the same issue with an iPad which I am still checking out.