Fresco pencil and small chisel brushes broken!!

For the past many years i have been using pencil and small chisel brushes quite extensively. As i am an illustrator i depend heavily on these brushes. After the past two updates both of these brushes do not work as they used to. More precisely, they are not precise, and this mostly applies to the pencil brush, the brush i use the most. All of a sudden while i am drawing the lines get distorted, pressure of the apple pencil is also distorted and doesn't distinguish thin from thick lines. It draws thin lines and then it starts drawing thick lines all of a sudden. It doesn't matter which size of the pencil i use its always the same. The lines are irregular and too big. I tried fiddling with settings, line pressure, etc. but nothing can fix the problem. 

From time to time the pencil stats acting normally but this is rarely happening, most of the times there are problems. When it does work properly, after few minutes the thickness of the brush changes without me applying additional pressure or drawing in an angle. In short, during the drawing sessions pencil brush starts acting up and drawing thicker and messier. 

This makes effectively impossible to draw with thin lines in Fresco which is very important for my illustrations. Pencil brush is completely broken and bugged.

Please fix this bug!!