Once a card like this is fixed, it is not typically awarded retroactively. You usually have to do the triggering event again after the fix to unlock the card. In this case, play a playlist that has the map in the rotation until you are playing on this map. I believe Classic Free-For-All and TTK Rumble both have it in their respective rotations and TTK Salvage, TTK Skirmish, & Classic 3 v 3 likely have it in theirs.