The same thing happened to me today. It occurred after I moved my soldier upstairs into an unexplored area of the map and got stuck inside some selves I and was unable to move out of that tile. It was also on same map yours occurred on. I was running V1.06. Unfortunately I forgot to save so I'm not able to include a save file.(Sorry)
Edit: After double checking your save file I realized that I was mistaken it wasn't the same map, though it still occurred on a terror mission.