I apologize for not catching this in my own testing, but this should fix the issue where picked up elevators return to normal shulker boxes.

I hope to, someday, reach a level where I am professional enough to nail this sort of thing first try.

Next update, possibly: Allowing players to stack elevators by clicking them together in their inventory. At the current moment, this isn't possible thanks to Minecraft's built in max stack size for shulker boxes, but I think it would be a nice little cosmetic change. If people want this, I will see about it when I have time