Game Crash Mission Reset

So one of the buggiest missions in game that has forced me to Restart my game several times continues to plauge my game. This time it is a case of my game crashed the restarting the game reset the mission progress but didnt refresh what i had to do for the mission. So the entire mission spiking the guns was reset to the begining of turn on the power to the main bunker. Does anyone know how to help