I've been through this place a LOT. Levelling 14th job through here. There were always 2 safe places to be when the pillars start to fall during the Batsquatch fight. Right up against the edge of the room, and either just to the side or behind a pillar. They either fall towards middle of room, or at a slight angle towards a side. They NEVER fall along the room edge, and certainly has never fallen outside the room.
Until now. I was way too slow to take a quick screenshot. I was startled! Something new! With a pillar against the wall, that leads towards the end of the dungeon, the entirety of the pillar, fell backward, and outside the room. Nobody in the group has seen this before.
Was this a fluke or has there been some minor changes to this fight, and maybe other things?