So I'm trying out an SP4 and am having trouble getting the pen to work. The pen does show to be paired via Bluetooth and pressing the button up top will trigger actions like launching OneNote. I can't for the life of me seem to get it to write though. Hovering over the screen does not show the hover indicator and trying to write in OneNote, Edge, or Drawboard yields no response. Anything I might be missing or is there likely just a defect in the pen?