That can't be accurate. Three reasons:
1. Loot cards in every other scenario are received upon first completion;
2. Loot cards are listed in the same category as 250 gold, which I received; and
3. The reward for completing a fighter's tale is listed to be 5,000 gold.
Unless the in game description is inaccurate, which may well be the case, the loot rewards should be received upon first completion.