I run a single monitor but two computers via a KVM. Use sim on one machine full screen and work stuff on the 2nd.
Used to be able to switch machines mid-flight and back again without issues.
After the last update, switching back to the sim machine has the sim locked up for a good 10 - 15 seconds, totally unresponsive, even if just on the Welcome menu.
I’m guessing the last update introduced a new behaviour on the sim window when switching focus.