I ran into an odd bug last night. I finished a room, and had one heart. While the screen was showing the stone wall as the next room was loading, I heard a sound like a shot being fired, and when the room loaded, my character had already been shot and killed right in the doorway.
A lot of times when I'm waiting for the next room to load, I hear a noise like crates breaking or something before the room is displayed, but I assumed it was just sound effects and had no effect on the game. Now I wonder if that's also the same bug, where the next room becomes active before the room is actually displayed, and I've just been lucky it didn't happen to damage me before.