Apple pencil creating strange lines when trying to write.

Are you having the issue when the ipad is unplugged from a charger, or when it's plugged into power? I experienced what sounds very similar to your situation. In addition to the written text breakup, I would also have random lines that would draw while I was writing. At first I thought maybe it was resting the side of my hand on the surface, but it was also doing it when I simply hovered. I went through the basic trouble shooting, forced restart, verified it was doing it on Notes, Notability, and Good Notes. I called Apple support and did a screen share. Of course it starting working fine when I had them on the phone. After a short time with them, I decided to back track and realized that it stopped doing it while I was on the phone with Apple. Of course, I only had the 1m charging cord, so I had unplugged the ipad during my call. I plugged it back in, and sure enough it started doing it again. I happen to be using an apple cable, but a generic wall charger I had in my desk at work. I brought my Apple charger from home and now testing with no noticeable issue. I'm leaning towards the conclusion that my trouble was due to the generic Monoprice wall charger. I'm wondering if it was generating some type of interference either with the pencil itself or the ipad pro's display features that interact with the pencil. Either way, it may be something to check as a possible source.