My Surface 3 Pen seems to be having issues... When I push the top button, OneNote appears (not the one I want, but that's another story....) But when I use it as a pen, nothing happens. There does not seem to be any connectivity. I have replaced the battery. >It seemed to work for a few hours. I have unpaired and re-paired the pen. >It seemed to work for a few minutes. Now... nothing. Clicking either barrel button seems to have no effect-- except the top button pulls up OneNote.