BUG B339 Pointer turns to blurry line

After a while (I can't seem to repeat, but does occur when changing between various views and windows) the mouse pointer turns into a dotted blurry line, but only on left display and external displays. center 7" and right internal have a mouse pointer.

H4, 1.1.2 B339, Full Size Wing, Playback wing 4 (in port 3)