Hhaving the same issue with 3 monitors in a T. I can minimize a session and when pulling back up it snaps the monitor 1 resized to the screen.

We have an on-prem Control server and are having the same issue. My techs who use firefox as the primary browser are having this issue as well. Any time I patch Control I have the techs uninstall Control, launch in Chrome to install, then go back to Firefox. It seems to help fix the issue half the time.