Looks like some miscommunication occurred, sorry about that @ramzoah and @kunoichi-chan. The investigation that was previously mentioned was in relation to app sharing which has since been resolved. Content such as DLCs is intended to not be sharable.
EDIT: Disclaimer, this was marked as Accepted Solution to inform others that the DLCs are intended to not be shareable. There is no fix to this as it is not a bug.