I'm having a possibly gamebreaking issue with the Keymaster/We have the Technology mission. Basically, at the part where Gat is supposed to take the helicopter and provide support, his super powered version just keeps fighting the enemies over and over. Later on when I'm supposed to follow his crashing chopper, he's not here, and the marker points me to him just swimming by one of the bridges, not doing anything.
Restarting from checkpoint puts us in the area where the chopper is supposed to crash, but otherwise it doesn't trigger anything else. Just waves of enemies over and over. Restarting the entire mission doesn't fix it either.