If you are playing duos and you or your buddy dies, the dead player’s Captain’s Bounty world quest fails. Obviously, if both of you die, that makes sense. No use in an incomplete quest when you’re dead. However, if one of you survive and revive your friend, the revived player’s Captain’s Bounty STILL has failed.
In a game where being able to revive your buddy is a core mechanic, the world quest should not fail upon death. It should fail when you leave the match if it hasn’t yet been completed.