Heroic Cover Token Facebook Gifts - Shared as Standard

Whenever I have received a Heroic Cover Token as a reward and chosen to share this with my friend (yes, there is only one) they always receive them as a standard token. The same has also been true that my friend, yes the same one, says they are sending me a Heroic Cover Token but I then receive a standard one.

Are all Heroic Cover Tokens always converted to standard? Is this a bug?