have you tried without this 3rd party app running?
i dont think the game would ‘hide’ the popouts like that and i know it has no ‘auto-popout’ feature
this sounds more like an issue with that 3rd party app saving some data it shouldnt, the game would use the windows designation for monitors so replacing one would not matter -it would still output to w/e windows says is monitor 2 or w/e ‘windows monitor’ you used the first time
i have 4 monitors (1 new) and have never seen anything like this before or after update12