Most Faction Missions are two part, so you first have to locate something by hacking/interrogating/talking to npc. Second part is mission part.
Well your game is so unstable that once you have done the first part, you ofthe crash before you get to finish the second part. Then you have to do the mission from the start, even though you know where the mission is.
Fix your game. Fix the Faction Missions, make them so you dont have to do the first part again, but can retry the second part of the mission.
I really want to like this game. Ubisoft you have ruined so much for us gamers, because you are only focused on sale, microtransactions an profit.