So I was able to get my craptop up and running again but im having a serious issue

I am a artist and also a gamer in sl so when i have to flip screens then flip back to (Open Canvas 5.5) my pen suddenly just wont draw so i have to throw away tons of work and its really freaking annoying.

Like no joke this is hard on me and im not sure what to do

Please help im using a huion tablet with Open canvas 5.5 thru steam system