My husband started a new character recently after not playing for a long time. He has been flying through the game and having great time doing so. Yay! The only problem is that he is unable to unlock the Sword of Crota mission. Somehow his game has completely glossed over that part of the story. He was able to unlock the subsequent missions, just not that one. I have included a picture of his map as it displays right now. It's bizarre.