UPDATE
It seems as though it may have something to do with an 18+ filter or something similar. The only connections I'd tried it on were my college connection (of course blocks 18+ content) and my 4G hotspot, which also blocks 18+ content. When trying to view pages through a proxy on my 4G which unblocks content, all the images are viewable. Not sure if this is helpful for the itch devs to know or if there's anything they can do about this, just thought I'd update with what I've found.