Project window: Graphical stuff messed up during drag

I encountered this since Cubase 8.0.30, but it might also be a Windows 10 thing.
Every time i try to edit something by dragging

  • edit automation points
  • edit tempo track
  • edit audio warp
  • lengthening a set of parts (sometimes)

and so on

The dragging tooltip just keeps repainting without clearing. So basically editing in the blind so to speak.
See picture attached