Hi
Your Copy-Paste Plugin has the following issues:
-When you place a floor only at the upper end from a roof, it will not be saved
-When you place a wallframe at top of another wallframe and this is not connected to another floor or wall, it will not be saved
-Armor with Slots (this is new) will lost this slots when placed in containers. If there was a armorplate in a slot, /paste will interrupt at this point, because of a conflict, when the armorplate should placed in a no longer existing slot

-When you place a wall or a wallframe at top of another wall or wallframe as a single column or 2 columns in a line, the upper walls will not be saved. When this columns a placed as a corner or 3 columns and more, it works. It also doesnt work, if you have 2 columns with walls and a third column with wallframes, in a line. Maybe there is an issue, when the plugin checks wallframes.