I switch between brush and hand tool very often and found this bug. I can cause all tools to freeze by switching between hand tool and brush and spam clicking outside the canvas.
All tools stop working. It resets by closing and reopening file. Of course I exaggerate this motion but sometimes I may paint outside the canvas, switch to hand tool to move around and this could happen, it's annoying.
I'm using wacom intuos pro M, the old version which I believe no longer receives driver updates.