Tried this mission again with just one other person in my group to see if the game will crash again, it did not crash the game, but there are several other issues with this mission:

Parameters for the mission:
1'Two person group
2' setting Hard

Issues
1. degradation on sound with primary weapon, leading to secondary weapon, reset sound when mission moved on with audio in the story arch of this mission,
2' ammo create only giving ammo to one weapon, when both weapon's was used,
3' AI falling through the floor on the top floor, final section of the mission
4; high pitched grating sound as it the sound could as I have heard before the mission crashed, on this occasion no fatal crash