SmallDwarfWithBigGun

This used to happen once every month, but now it happens couple times a week. I have become so paranoid that I leave my sketch so it can save. I could be writing down notes, then my pen strokes won't register for 3 seconds, and the whole note will be wiped. If I save and leave, there is nothing left. If I cancel instead, I lose all my progress since I left. I cannot find any discussions about this topic on this site. What is happening?

I use a wacom tablet and it has no issues other than when using evernote sketch. Drawing has a considerable input lag and is frustrating to use. The issue persists even with mouse. What can I do to fix this?