I'm not surprised, as all use the unity 3d engine. Why it would not happen in ai war is a mystery to me. There is definitely something external to the games causing this, but I don't know what it would be -- some sort of software that impacts keys or mice or gamepads. I've gone through all the cases of such things that we've run into in the past -- usually it's the gamepad thing. I'm honestly not really sure what to tell you. You might try disabling that mouse program temporarily, or thinking if there is something else around. 500k copies of these games sold collectively, and this is the first report that wasn't solved by the solutions already suggested, so there is something very unique here.
Sometimes things like the office extensions for Asian characters can cause oddities with the unity 3d engine. Anything like that enabled?