[Mission failed after successful extraction from orb vallis]

So, I wanted to head back to fortuna (via the elevator) after quite a long toroid farming session. But as the elevator is on it's way down, the end of mission summary window pops up saying that the mission's failed. No rewards.

Neither me or my friend died once during the mission. This happened twice in a row and I lost about 20 toroids in total and a bunch of other stuff.