I having the same problem with pencil tool. This happens too often that it makes my app unusable if the are too many stroke on screen and user draw with pencil tool :(

Yeah, I know this, it's a bug from PencilKit. If you create a new stroke from another stroke, even if you have the same path with stroke points - the pencil stroke will looks different. It's not only different in texture but also in width and opacity. Sadly we couldn't do anything about it. I was hoping they will release new PencilKit version in WWDC 20 but nothing happended