Brush color randomly switches to black

[Shanol]

I have just got the Paintstorm and i feel it's power already. But what worries me is the brush behavior while painting over.
It's hard to explain to be honest, so here is the gif:


It's slow due to running recorder, nevermind it.

The color in the color picker did not change but it starts to paint with black no matter what.

P.S. Я не стал писать по-русски, так как все вроде бы пишут по-английски.

[support]

This bug can be calls in point with transparency = 0; If you uses transparency dynamic better little increase minimal count.

Что-то на гифке сильно тормозит, если сильно тормозит, а уже пытаешься новые штрихи делать - баги лезут с большей вероятностью.