Title says it all. I just completed the pit of heresy solo last night. Every encounter, completely solo. Fire team locked. Took a short break in orbit because I was frustrated at the third encounter, came back and got the rest done. No triumph. At the least there should be a warning or disclaimer in game so you know that leaving the dungeon will void your triumph. I wouldn’t have fricken left if I knew it would be voided. Duh. What a complete waste of my time. I’m so genuinely upset at this that I might just not play this game anymore. I feel completely robbed and screwed over. Absolutely no desire to even attempt this again. I did what was required, now give me what I’ve earned. The game should recognize solo completion of each individual encounter and once they’re all done, boom, triumph is yours. Simple as that. The fact that it’s anything but that is dumbfounding.
Same thing happened to me, only I ran out of flags and went to the tower to get more. It was very frustrating, but I understand why it's that way.