This happens on both my Windows 8.1 and my Windows 10 machines... When I end a Mac host session still logged in on the Mac, the client window closes fine, but if I logout on the Mac then close the client, the client window does not close, but is unresponsive. If I go into Task Manager, the process is still running and I have to end it. When I end it, I get a Windows Pop Up saying the session has ended unexpetedly.