Would this be a glasswire issue, or something to do with your screen resolution during and after gameplay?
Nonetheless, I would be curious as to the reasoning. I know I have had similar issues with large monitors in regards to certain full screen applications (not running in full screen resolution, but smaller reso’s) and desktop icons squishing to the fit the last known screen resolution. --assuming that makes sense–
In that case it would be an issue completely outside the scope of any given application and more inline with those particular application (games etc.) settings.
Although, I am no expert, just throwing my own experience at this.
It has something to do with the screen resolution during and after gameplay (but I guess that is obvious). I played the game full screen at native 2560X1440 and the Mini Viewer kept his place.