I've been having trouble with narrowing this issue down because upon scouring the internet for answers I have not found any case like mine, so I have no choice but to bring my issue here to *maybe* get some insight

For reference, I own a Huion Inspiroy H640P tablet with a PW100 pen that I have been using regularly for close to a year now. My Huion driver is up to date (infact I downloaded it just to figure out this issue LOL), my PC is fine, and my tablet/pen do not seem to be extremely physically dented or broken, I have taken good care of both. This only started happening, I believe last night? Earlier in the day yesterday the pen was working just fine. 

After booting up my PC, both the tablet and pen work fine. A brief minute or so passes, and even when *hovering* above the tablet with the pen, it causes the on-screen cursor to move sporadically in directions that the pen is not physically moving in, alongside it clicking/right clicking rapidly on its own. I can hold the pen in *one spot* and, several times over, it will move and click outside of where it is supposed to move and click. 

To further clarify the reference video I've attached, I am holding the pen in one spot on the tablet surface. It did not move. The only thing moving is the on-screen cursor. I have several other reference videos as well that I could not attach here, if this one is unclear I apologize.

It's probably a pen issue idk, I am just wondering whether this is a problem I can fix at home or if I will have to buy a completely new pen. I'm just really confused on how this  could have happened. Any answers about this would help

In deep trouble w/ Huion pen