Hey, love your mod!

Unfortunately I can't use copy/cut&paste underground. When pressing CTRL+C/X the corresponding symbol at the mouse cursor appears and immediately disappears, only to be found as a new item in the inventory after returning to the main surface. Is this a known issue? On purpose even?

Furthermore, blueprints that I've somehow used underground, are suddenly empty when returning to the surface. I've not figured out yet under what circumstances this happens but I'll keep watching it and give an update once I know more.