I forget off hand the exact name of the station that gives this mission, I think it's something like Nano Research Corp or something like that, but for the mission that involves attacking the Xenophobe fleet to recover an artifact, I managed to accept this mission even though I already had the mission to go find Kate Morgental.
I then completed the Kate Morgental mission, but the mission target pointer was not re-added for the Xenophobe one. That made it extremely difficult to find the Xenophobe Ark in the nebula again. Talking to the research station again did not re-add the mission pointer.
Also, a piece of general feedback, I think that the toughness of the research bases in Heretic should be increased and the lead time of the warning of when the Iocryn attack should be increased. When the player is on the other side of the system from a base, there is nothing that can be done to save the stations that are attacked, because the Iocryn sentinels can level them in only a few seconds once they get there. Worse, while I was taking the time to play through the AI mini-game, a station got leveled, and I never had time to even try to respond. The whole thing was extremely frustrating because it felt so random and out of my control.
