When I paste a base & it doesn't sit right on the ground. Before, when I use /undo. It removed all the base, including contents of storage box's. But having updated recently to the latest version. I have noticed, when I use /undo, all the contents of the storage box's are in pounches on the floor. Now, this is a problem for me. Because I paste loot bases randomly around a live map for players to raid. Now, if I get it wrong, players can just walk along & collect all the stuff, which has happened when I didn't realise. 

So, has something changed? because it never used to do this.

I think using the /undo to remove chest contents first & then the structures & deployables. It would save a lot of time, at least for me. But if you get the placement wrong, you have to undo & try again, leaving items on the floor. 

Also, are you aware of the buildings pasting under the floor? Seems to happen to me often.