The mission where Dawn takes the beam bomber against the Hertak Armageddon to save the Alligator seems to be broken. I had played the previous mission and accidentally friendly-fired and destroyed the Alligator, just after the Nordera ship exploded. As the screen faded to white dialogue regarding the Hertak ship entering came up, and the mission ended. The next mission, all units are gone, the player isn't in control of anything, but the background and the node is still there. Dialogue still takes place as if everything is normal, and directives ordering the destruction of the frontal beam cannons appear.
Any suggestions on how to fix this?