During my previous bug report, I made an example map.

https://psteamcommunity.yuanyoumao.com/sharedfiles/filedetails/?id=2670997162

I discovered another issue while making it; if you make a blueprint out of the "moving dirt" object, then paste that blueprint in, it breaks. The pasted object does not seem to be a part of any hole, cannot be selected or moved, and even persists between loading different maps.

This can be recreated by making a green, grouping it, adding a move action to the group, and then making it a blueprint.