Hard to explain but simple issue

well, after made a fireplace with (rag, stick and wood) -> picture one.
we can of course disassemble all and it returns rag stick... on the floor.

But if there is something inside the camps fire , theses things actually disappear... !

need to fix like u cannot remove all the fireplace if something in, or thing get returns on the floor as the same as rag... ;)

example pitc 2