maybe like try tapping the tip of the pen with your finger a couple of times?? i don't know if it'll fix the dots but my tablet pen does that exact thing from time to time and when i tap its tip with my finger a couple of times it goes back to working properly,,,,, but my tablet pen isn't an apple pencil so i don't know if this will work for you ;v; hopefully it does though,,,, if it doesn't work i'm sorry for wasting your time,,,