Scratchboard tool and Thick and thin pen missing pixels

Can someone help me with this issue, 

I didn’t pay attention to this before, maybe there wasn’t such a problem, but recently I noticed such a bug with these brushes, nothing helped, not reinstalling the tablet driver, I tried it on different tablets on three laptops, there are different versions of Windows.
By the way, you can share your screenshots of the lines of these brushes, how they work for you.
don't forget to increase the brush size