My friends and I were playing this map fine until chapter 3, we were lost and we had gathered the red gem, and the herb, and the MO disk. After a couple of hours of roaming around we decided to look up the walkthrough, and what we had left was the battery. We headed to the room where the battery was supposed to be and it was missing, we assumed maybe one of us picked it up on accident but then we headed to the safe room and the level didn't end. So we restarted the map thinking maybe it glitched, but it didn't spawn in the room it's always shown to be in, was the location changed or is this a bug?