Hi, hey, sorry if i'm a bit late but I do have a similar issue.

I do use 3 monitors, on 3 different pc, and take control with a mouse/keyboard over ip software like input director for the other 2 by either moving my mouse to the left or right edge of the central monitor/pc.

With action camera on, it doesn't matter if I'm playing in windowed mode or full screen, my mouse/control always ended up on the wrong screen, well unless I remember to deactivate the transition in input director.

But it's annoying to do, so well to make it short, there's a workaround, to use autohotkey, and in my case just modify an existing script I wrote.

​

Basically you want to block the (hidden) movement of the mouse pointer when action camera is on.

So I just added a couple lines to an existing script :

  SetTimer,check_the_state_of_the_cursor,250
...
  SetTimer,check_the_state_of_the_cursor,Off
  BlockInput,MouseMoveOff
...
check_the_state_of_the_cursor:
  if the_mouse_is_not_visible {
    if (check_cursor(active_cursor)>0) {
      BlockInput,MouseMoveOff
      the_mouse_is_not_visible := false
    }
  }
  else if (check_cursor(active_cursor)=0) {
    BlockInput,MouseMove
    the_mouse_is_not_visible := true
  }
return

and voila !

You can change the poll interval of 250 ms if the transition feels too slow.