Title basically. If you close Unity on your second monitor, Windows of course remembers it being there so it opens up there. Issue is, when I open it there, the editor becomes completely white and unresponsive, to the point that I can close it with the X button, but it doesn't stop. In the background, a Unity editor is still running, that needs to be ended in task manager. Funny part is that while this background editor is running, all subsequent editor instances, regardless of where it's opened up, suffer the same fate and become white and unresponsive.