So I updated Animate to the 2020 version, and I've noticed something, the brush is a lot stiffer than it used to be, the drivers for the tablet. The very beginining of the brush stroke and it has this straight line, is this a setting that's been added? I do not remember this at all, it used to be a lot more smoother.
I am not sure I have heard of other users with this issue. Most such problems usually go away by updating to the latest graphic drivers from the manufacturer's site. Can you try that? If you still need assistance, you can get in touch with our support team directly using this link https://adobe.ly/2WYE62m