I took on an optional quest from a dude in the Castle, who asked me to retrieve some shit from The Greatwall location. At the same time I completed the investigation and griffin fight main quests, I completed them first and then decided to go look for his stuff near Greatwall, and since I forgot to put down the portal crystal, I had to get there by foot, which took me forever, and when I'm almost near the quest destination, my main pawn falls to his death, I port back to the city, summon him back and decide to turn in completed main quests and goddamn game cancels my optional quest that I almost completed
No warning or fucking anythin either