rgba color bleed?

[Phanwadee Khananusapkul]

I'm returning to using pencilCode after a long time away, so I don't remember if this behavior is new:

using rgba color to draw a path, there is overlap/bleed when the turtle turns.

For example, in this code: http://jgplay.pencilcode.net/edit/codeDoodles

While you can see the issue in the main body of the program, it is clearer at the end when I draw a simple 2 line path (fd 100, rt 90, fd 100).  The vertex of that angle is darker than the rest of the path (and the end of the path also looks a little darker.)