Tool automatically switching?

  • Hello, I'm using a surface book with CSP EX. Since this week, everytime I draw with the pencil tool it switches to the grab tool when I lift off of the screen, it tries to change back to the pencil tool, but if I move too fast it just grabs my canvas and moves it.
    Is there a setting where I can fix this? Just to be said, my surface is up to date, have reinstalled drivers and the program too. I've even did a chat with Microsoft support and they are certain my device is working as it should.