When using the brush tool(with angle jitter set to Direction), an error pops up when also rotating view. As long as the canvas is at its default orientation, the brush paints along its path appropriately. If I've rotated the view, however, each instance of the brush's preset/tip does not adjust for the new orientation of the canvas.
if the brush's preset looks like this (a small horizontal dash):
when painting as I've described, it should follow a straight line like this (and does, as long as I have not used the Rotate View tool):
however, if Rotate View is used to rotate the canvas by 90 degrees, it instead paints like this: