Unburied spawned in geometry.

I was going through one of the lower cathedral levels (2 or 3) and came across a misfortunate unburied who had spawned in a boulder right next to the stairs to the next level. I don't have all the details because I just took a screenshot and continued on, but the screenshot turned out completely grey for some reason, so I'm working from memory.

It was level 2 or 3 of the Cathedral, the exit was in a fairly open area, and the entrance to that map 'block' was to the bottom right. The unburied was trapped to the right of the exit in a rock of some kind. Since I was playing the monk, I used Dashing Strike to check whether it was stuck, or just very dumb, and it was indeed stuck; I had to use Dashing Strike to get myself out after killing it.

I'm not 100% sure if it wedged itself in there before I arrived, or if the game spawned it there, but I would tend to think the latter.