It seems that the pen aspect is not relative to the viewing angle of the canvas. It seems like it should be?

ie. with a low aspect setting, the pen will draw thin lines left to right and thick lines up and down. If i rotate the view, its like the pen doesn't rotate with it: line thickness is relative to the canvas and not the view of the canvas.
(this is in 4.5.1, but i didn't see any mention of this in any of the recent updates)