UPDATE: Issue seemed to resolve itself after a couple of waves, but I was really concerned the run was about to get wiped soon as this started happening.

Original Post:
I don't know what to call the rectangular obelisk things that spawn with room modifiers, but the "Night Clause" one seems to be bugged. Monsters are healing for a crazy amount regardless of what room they are in, and are practically invincible now. I used dust to eliminate almost all dark areas, so they shouldn't have been healing like crazy everywhere (far as I can tell).

Playing the PS4 edition on my PS5. (In order to co-op with my friend on PS4).