Editing WoW:API GetRewardSpell (section)

== Details ==
Just as almost any other quest gossip function, GetRewardSpell() returns data that refreshes only when you see corresponding gossip page. Any subsequent calls will return same data until next update. You can watch updates for data returned by GetRewardSpell() by registering for QUEST_DETAIL and QUEST_COMPLETE events. This means that if, for example, you talk to some NPC and check details of quest that offers spell reward and then talk to another NPC and check progress gossip page of quest you've accepted previously that offers spell reward too, this function will still return data of spell from first quest because progress page does not show rewards and their data is not updated.