I don't know if this is a normal thing, but every so often my blood altar looses a beacon on the 5 th tier. A couple other people also had this happen. Is there something I'm missing?
Well. It was just a question. And every other day I will either find it missing or broken on the ground next to the altar.
Hmmmm....since beacons are light sources, could some of the zombies be breaking it? Is the area around the altar lit enough so mobs cannot spawn? Is it possible that zombies are coming in from elsewhere to break it?