I've run into one issue that I never had before in Big Sur, but now started with Monterey.
I'm remote controlling from a Window 10 PC to my Mac.
At a certain point with remote control, it is as if the "fn" key is being held down, and that, for example, turns the "m" key into something that selects the menu bar. It makes typing impossible.
What triggers this is the Terminal app, when prompted for a password when using SSH to a system. As soon as the password prompt is presented, it is as if the "Fn" key is now held down. Exiting terminal does not correct it, and the problem continues in other apps. Using sudo and prompt for password does not seem to trigger this.
Disconnecting the GotoMyPC session, then reconnecting immediately, fixes the issue until I try the same process again, where when using SSH prompts for a password.
I also noticed, once this happens, if I have the Mac on-screen keyboard up, pressing "CTRL" on my windows PC (where I'm controlling from), results in both the CTRL and FN showing as activated. Releasing the CTRL continues to show the FN key as being held down.
I should add, if I'm on the system directly, and not under remote control by GoToMyPC, the same input issue does not occur. It's as if the GoToMyPC remote viewer is making a mess of the keyboard mapping, rather than it being a problem on the Mac itself.
@Toasty66 Can you confirm what version of GoToMyPC is installed upon the host Mac?
If I use a Mac to remote control the Monterey machine, the same problem manifests itself, so it is not specific to it being a PC remote controlling the Mac.
I've also noticed that while the screen of the host gets blacked when controlled (security preference), anytime a window is set to full screen (click the green button on the window to expand), or returned from full screen, the window in question is monetarily visible i.e., as it expands to fill the screen, or contracts on exit. Once it finishes the animation, the window disappears.
Well, I'm not sure I need to call in as I think it's pretty easy to duplicate.
I've also verified that I can duplicate both problems on three different systems that have been upgraded to Monterey.
Keyboard issue: Confirmed further that it only impacts the client side remote-controlling the host. If I turn off host screen blanking, I can type directly on the host with no issues. On the machine remote controlling the host, the keyboard input issue continues i.e., as if the FN key is being held down. I've tired both PC and Mac as the remote-control initiator and can duplicate the issue.
Screen Blank: Confirmed on three different machines that a window in the action of being set to full screen, or return from full screen, becomes visible on the host during the grow/shrink animation.
@Toasty66 There is a new build that hasn't been rolled out to all corporate accounts yet, b3339. If you are the administrator of your account and wish to upgrade all hosts to this before it's the default build, we can force the change early in Customer Support.