I’m on SC Vet in the PV challenge dungeon in High Town and am in the ‘challenge chamber’ of the dungeon (could not decipher the actual name of this area but every CD has one, the one in SoT is called the ‘Chamber of Souls’). There are no enemies left between the barriers but I cannot leave and the chest remains closed.
Idk if I’m allowed to post pictures but this is the best evidence I can give. Kinda bummed to be out a key.
*EDIT - Super fast update, I just Ring of Steel’ed all over the room until I hit the enemy that was hidden inside one of the barriers. I suck at all things game dev but I guess they had spawned inside the barrier? It was the upstairs one. Yay I keep my key!