@Dinkydau

this would be like the run-aways.. but instead of forward, you have rotate

as it happens, try to figure out if your mouse has nudged over to another window...
as the mouse moves over the other window.. it could change the active window.. leaving the other window with a 'left arrow down'... but no 'left arrow up'

i believe i have a solution and will be working it this weekend

(of course, if you mouse drive you don't run into this problem)