I was idly flying a UAV (The Sentinel) in the Editor when at some point I decided to use Splendid Camera to look at it. After being irritated by Splendid Camera's not so splendid refusal to reacclimatize to lighting after switching N modes, I decided to exit it and return to controlling the drone.

And lo, upon unpausing the game...every control died. Except for the map and other random and pointless things. There was no mouse menu. There was no mouse control. There was no WASD. All that was left was the visage of the drone AI reassuming control, content merely to...circle.

This is actually really bad, I was trapped there for the rest of the session.