Thanks Mike. I seem to reproduce the problem when I minimize Roon and click on Outlook, for example, and then click back at Roon. The screens reappears if I resize the windows. If, right after that, I repeat the procedure, I do not lose the Roon screen, so it seems to happen after some time or event.
I have the latest drivers from the AMD site.
Hope this helps. Let me know if you need anything else.