First time in these forums, I bid a wholesome hello!
So i only noticed this recently after playing around between Full Screen and Fake Fullscreen, but my curser sometimes treats as if my menus, characters sheets, or skillbars are part of the map. My characters will then move to the "location" when I am actually trying to put 2 points in Intelligence and so on so forth. Occasionally this ends up using a point in combat, or initiating a fight I was getting ready for but not completely set. It happens most often when I switch from one character to another, so I would have to frantically switch back to that character and get him with the team before I have half my team fighting and the other half catching up.
I wish I had solid evidence and I have not seen or heard anything like this. I have 800 hrs in the game and this run is the first time I am experiencing it.