So essentially I load into Zero hour and go through nearly the entire mission until I reach the boss. At the boss I begin fighting the boss I take out the drones and then use my celestial nighthawk on the boss. Then after I use my celestial my screen goes black and I get kicked from the mission. This has happened 5 times in a row now and I'm getting extremely frustrated because I can not beat the boss nor even attempt to complete the puzzle for the ship. Is this a glitch or what the hell is going on!?