I'm not entirely sure what exactly is going on, but I have an iron golem and two spiders around it, and the golem doesn't seem to be attacking them. A bit later (~40-50 seconds), the game freezes. The issue seems to be repeatable, so I'm attaching the world folder copy. I believe export world changes some files, so I didn't use that option, but I'll keep this world untouched, and can provide world export (or other information) if needed.

Edit: The last two times the game crashed while I was accessing (and emptying) hoppers to the left of the brewing stand immediately next to the starting point. This action may have something to do with the freeze. However, first freeze did not involve the hoppers.