So this is bit of a weird one. There were a couple of orders created in the shop I run, but there was no shipping address in them. When I tried to reorder from the backend, the shipping address section was greyed out, and
"You don't have to select a shipping address."
was being shown.
Even in the shipping method section,
"You don't have to select a shipping method."
This has never happened before, and googling it returned nothing except some translation CSVs.