For a long time now when I've been using Krita there is a consistent glitch that happens constantly. I'll be drawing normally then click outside of Krita to look for references or check messages. When I go back into Krita I often see my cursor goes from the pen tool to the line tool. As soon as it happen I can never select any other tool. Even if I close the canvas file and open a new one it doesn't stop. The only way I can fix it is if I completely close Krita then open it again. It is the most frustrating thing and I really need a solution because it's driving me nuts.

Can you go to https://krita-artists.org/ then sign up and sign in and create a new topic there for this problem.
That forum is very active and you can easily upload screenshots etc.