I am on a Windows PC running Windows 10 Pro 22H2. I have been having this issue in Illustrator since version 28. I DID upgrade to version 29.1 and it still persists.

I am using a Huion Kamvas Pro 16 GT with the latest driver (15.7.6).

What is occurring is when I use the drawing tablet stylus to manually scroll the vertical scrollbar by grabbing the cursor with the stylus, Illustrator fails to stop scrolling even when removing the stylus from the cursor. Simply dragging the pen stylus across the screen causes everything to scroll wildly. The mouse will not regain control either. Everything scrolls wildly even when using the mouse.

This is ONLY resolved by going into Preferences > Devices and then unchecking "Enable Wacom". Then everything works normally, but I no longer have pressure sensitivity.

I have read other forums and find that this is NOT a Huion issue as it occurs with Wacom and XP-Pen tablets as well. I find it ridiculous that I have to pay so much every year to a company for buggy software that I can not use properly.