The behaviour is definitely not normal, I got the same problem and realized it when my writing became all joined-up while using it in a lecture and pen strokes in OneNote became very thick. My guess is that it could be one of the following two issues: 1) Your stylus nib is stuck in the (semi)depressed position, so the pen is constantly sending a 'positive-input' signal to the digitizer, and so the moment it gets within inking range of the digitizer it starts inking/clicking. 2) I'm not sure what kind of active circuitry is incorporated into the pen, but it could be messing up inside and sending erroneous input signals to the digitizer. I fixed my problem after lightly tugging at the pen nib and power-cycling the pen by removing the AAAA battery and reinserting it after 10 seconds. Here are clippings of my problem before and after. OneNote pen stroke thickness was on "Thin" for both, but as you can see on the left, it's way too thick.