A fairly spectacular looking bug, see attached.
This comes from a manual area hatch/fill , set to hatch, ISO (Plastic), 0.5 spacing @ 0 deg, boundary.
Tried switching to software opengl, no dice. Changing hatch from ISO (Plastic) to another mostly doesn't work, although the 'Earth or Ground', 'Honeycomb', and 'Stars', and a few others worked correctly.
Hatching on top of it with another layer and a regional enclosed sketch is even more fun, because it has similar results, but not *exactly* similar - different line segments are removed.
The bugs in hatching are driving me up a flippin wall. I can't do the exact same command and get the same results from drawing to drawing, it's going to find another crazy way to mess up the hatch.
It's the mutha' flippin line format. Can't even select the crosshatch and change the line format, you have to set it to straight line and then redo the hatching.