Brush color turns to white despite it not being white initially or in color panel

[Boldline]

I seem to run into a consistent issue where my brush starts out with a black stroke corresponding to the color panel, but the second stroke I make turns that new stroke into a white color and my color panel gets a white and gray instead of just black stroke and null fill.

Here is the video for this issue. Im not sure why there is the delay in the action in the beginning - skip to 10 seconds in to see the issue

This happens every time I use the brush tool. I have to go in and change the white stroke to black and going forward it cooperates as expected. I might be the problem here if I am missing a step in my process.

[VectorStyler]

@Boldline Could be an issue with the brush not stretching correctly over shape.
Send me the file containing the white brush.