Game restart during TW battle

I was doing a TW and game crashed. I already had killed 3 ennemies toons. When i came back all his toons were still there with full protection and me i lost my squad and it counted as 1 defeat..

The reason i guess is that in the middle of the battle i switched to my camera to take a picture and then when i switched back to the game , the game did a restart instead of showing me my ongoing TW battle