Thx man. I'm gonna try this soon, I've been stuck on this mission for months because of this. Did you use your last save or just restarted the mission all over ? Or even single player from the beginning ?
It just that I have this problem on my hardcore run and I have a USB save at the beginning of the mission and a checkpoint just before this glitch on my HDD. I just hope I won't have to restart this run all over