Was doing conjunction survival on Circulus, in the last 5 minutes from an hour I deploy my necromech, time runs out and I go to operator mode.
However I'm now immune to damage and can't hit 5 to go back to my warframe as it says "invalid target" and when I hit esc or P nothing showed up. Didn't think much of it until I get to my listet and my weapons are where they were before I did the mission and no Vorunna helmet, or other loot.
Cool bug.