Got this bug and it was very annoying, but I figured out an exploit to avoid aggro that doesn't need cheats. You need to use sonic shock on all 3 of the npc's the moment the dialogue ends (this freezes them in-place, meaning they don't get in the way of the car, altho they still aggro for some reason, sonic shock really just delays aggro), then use optical camo cyberware the second the garage door opens and sprint out of there.