Since the begging of the month I'm facing this problem, now and then my strokes come with a blob in the end or a dot, this is very annoying. It happens only in clip studio with all my brushes (natives or custom ones) and even erasers. Sometimes I feel a little lag before it does this shape, but not always.

I'm using XP-Pen Artist 13.3 Pro and MacOs Big Sur.

Here's what I've already tried:

- Reinstalling CSP
- Reinstalling the tablet driver (the lastest version and older ones as well)
- Changing tapering settings
- Checking and unchecking "adjust by velocity"setting
- Cleaning my pen nib
- Replacing the nib
- Using an external stabilizer (Hej Stylus)
- Unplugging all my cables and setting the tablet again from scratch
- Contacted the XP-Pen support and Celsys support as well, but I'm waiting for answers.

I don't believe this is a problem with my pen because it's functioning pretty well on other software like photoshop, medibang and sketchbook pro.