LogMeIn has identified the cause of this issue, and stated it may be caused by Fast User Switching.
While LogMeIn works on the fix for this issue, I have found a workaround.
The solution is to disable Fast User Switching entirely. While this may be an issue for some users that bounce from one account to another, this will [seemingly] fix the issue with LMI.
To permanently disable FUS on a Mac machine, run these Terminal commands:
So far, every machine we have deployed this fix on has not had the issue again - even after multiple restarts and attempts to break LMI again.
Macster - I would try this fix on at least one machine having the issue. Doing this fix cleared our issues immediately, even if we have never Fast User Switched on the machine.
This issue is still unresolved. In my case, it's a Mac mini, headless. Funny, that a cheap HDMI -> VGA dongle connecting to the HDMI port fixed all my problems. I tested it back and forth with multiple reboots, logins-logoffs, and works like a charm.
Well this is odd.. All of my issues have been resolved with recent releases of LMI - on Intel Mac minis, M1's, and M2's, all of which are connected to monitors.
I WILL say, we do run some Intel Mac minis headless in a server environment, and we MUST plug in a dummy HDMI plug, shown below.
Otherwise, I am sure we experience the same issues you are. It's not impossible to control the computers without them.. Just very difficult as the screen is extremely distorted.