Seriously, it happens to someone in my group almost every time we do the dungeon that they fall through the airships just before the first boss.
Also, maybe this is intended, maybe not … but while flying between the three ships, players are blown off their direct course. It’s really annoying (if deliberate) and I don’t know if it directly relates to falling through the floor, but it seems like I fall through the floor more often when I’m also getting pushed and trying to land at the same time.
It’s crazy this dungeon still has as many issues as it does and they chose make it an option for us to vote on.