When I print a hatch, the PDF shows spikes at every node. Below is what I have in Rhino, and what I get in a PDF or preview.
The smaller the hatch is on the page, the more pronounced the spikes get.
Here is a video:
Strangely, if I add a random surface to the scene and repeat the print, the spikes are gone:
However, then the hatch also loses its sharp corners (gets an outline, which makes it thicker):