Hi I've tried to see if anyone else has this problem but couldn't find an answer on here so maybe someone knows how to fix this.

Whenever I use my Graphics Tablet in Krita it all works fine - as in using the stylus to select brushes and moving it around the screen- however when i begin to draw it starts to mess up this mostly includes perfectly straight lines randomly appearing while I'm drawing or Krita lagging as I draw. This doesn't happen when i use my touchpad to draw or when i use my graphics tablet on other art programme such as gimp. I was able to find an answer to this for windows however I'm using a MacBook so the solution didn't apply to me.

Anyone know hot to fix this and get my graphics tablet to start accurately working without random lines appearing?

Here's some additional info:
My laptops operating system is: macOS 10.13.6
Krita: 4.1.1
Tablet: Huion H420

I've tried deleting and uninstalling both Krita and the tablet drivers nothing works! I just want to solve this issue. Thanks in advance

Huion on macOS is a real problem at the moment, until they fix their drivers. I've reproduced something like you describe on my macbook pro, with Krita and Corel Painter, but the problem is that the coordinates we get from the tablet really are like that; and there's nothing we can do in that case.