Hey there,
i just noticed that whenever a legacy shelter is in proximity, the copy function breaks apart. Sometimes it just copies parts of the building or even just the shelter without anything in it and the door missing. It doesn't even remember anymore that i pasted anything beforehand that it could undo.

I made a video about it and a screenshot of my server:


Guess that wasn't intended, so i guess have fun tinkering with it a bit more? 😅