Custom Brush with right angle (90 degree) corner problems
Hello,
I created a custom brush.
It works fine with round corners.
But when I draw sharp right angles, weird things happen. Unwanted bit of the brush breaks out from nowhere. See red circles below.

If I reduce the stroke weight it disappears. But the original brush I based it upon (and other pattern brushes that I've studied) - no matter what stroke weight is used, this problem doesn't occur.
What am I doing wrong?
Thank you!
