I paste a building onto an iceberg or a rock, but the buildings foundations start at the terrain underneath the rock or iceberg and other similar non-terrain parts of the map.

This limits me to only terrain, it is very unfortunate since before I updated to this version I could do it without a problem.

Also, since updating /undo now for some reason drops all the loot on the floor instead of deleting it completely, meaning I have to mop up tonnes of loot after I /undo.

Flame traps also explode on /undo, causing unnecessary server strain.

Merged post

https://imgur.com/a/JvhUoYr

Here is an image of the pasted building clipping straight through the terrain, and for some reason starting the whole thing many meters underground.

You can use the height parameter to fix issues like this, unless something is perfectly flat the AutoHeight doesn't really work, it's great for getting a starting point but besides that doesn't really do much on non flat ground

Merged post

And I'm pretty sure also that I solved the issue with building going straight to the floor btw.
The loot issue also should be solved, that was caused because I made it non blocking (so the server doesn't freeze completely) which gives the stability a chance to make chests collapse which drops the loot instead of removing it.