When I connect from a Win7 machine to a Win10 machine, I can log in just fine. I can even see my desktop. But then the screen is immediately frozen. The tab at the bottom right is still there or half-way towards retiring itself. In this state, mouse clicks or keyboard entries are not shown. (I do, however, see evidence that that input is still being accepted/processed when trying a 2nd or 3rd time.) It's just that my screen is frozen. Screen re-fresh does not correct this. I simply have to exit the session and try again. Usually the 2nd (or certainly 3rd) attempt will do the trick.
It appears that I never freeze at the login screen or at "Initializing parameters" as others have reported. That always goes fine. I always can login. I'm running, at this time at least, the latest version on both machines (12.0.72365).
Has any experieced this particular aspect of freezing?