Blobby lines with the brush tool

So I picked up Toon boom again after a few month hiatus. It worked fine before, but I just updated my cintiq 27qhd on windows and now all the lines are blobby looking. When I use the mouse it has no problem, but as soon as the cintiq pen is used they make these weird blobby lines, I’m not sure what’s causing the problem.

Attached is a picture. On the left is the mouse, on the right are the pen lines.

There are problems with the newer Wacom drivers that should be fixed in
the latest patch releases of Harmony 15 and Storyboard Pro 6 available
in the “My Downloads” section of your account.

If you’re running an older version of the programs use this Wacom driver instead: