Short "shading" lines issue

[renneslechateau]

Hi,
I have some seriously annoying problem, that I've unsuccessfully tried to solve for few days. I have no idea what I could do more, so you guys are my last hope. I have Surface Book 2 with WinTab already instaled. Pressure sensitivity seems fine now, as far I don't lift my pen up. When I do, no lines appear on the canvas, as if Painstorm does not detect that something has been drawn. I'm working mostly with "pencil" digital sketches, so I'm usually shading with tens of short light lines, and they simply does not appear on the drawing. Same lines seems fine, when I draw without lifting my stylus.
I tried the same on Krita, Autodesk Sketchbook and ArtRage, and it works superb, so it seems like there's some problem with Paintstorm. Maybe I do something wrong with settings?
It seems that Paintstorm it's useless for me because of this issue. Please help.
r.