Huion Kamvas 13 Pro, and HUION Slim Pen PW550S 9.5mm inverts pen pressure
No matter what I seem to do, even after having returned a pen in exchange for another duplicate the pen's pressure inverts. While hovering it's at it's maximum 8191, and when you apply pressure the number goes down instead of up. This is all while the pen it came with works fine with the proper pressure.
So far I have tried two different PC's, one windows 10, and another ubuntu and have tried reinstalling the drivers on both but they present the same issue.