Well happened to me now also last night i was playing my warrior doing his relic reborn quest i had just gotten up to killing garuda and keep failing so i decided to call it a night it was after midnight on 11/19/2013 not sure what time exactly but it was late or early. I then logged in today to continue the quest and i went and joined a duty for garuda we won finally. I was so excited to move on to titan. But when i went to turn it in and move on i noticed my quest was gone i thought that was wired. So i went to the starting npc and he gave me the quest all over again from the beginning.

What is being done about this it took me a lot of time and effort to get that far.

Server-Balmung
Character-Demi Gorgon
Date It Happened-Between 11/18/2013 and 11/19/2013
Quest-A Relic Reborn
Issue-Quest Disappeared