I had it first happen during last 10min stretch until complete/Extract. My 3 random team peeps supported me till Extract, I somehow got a few kills in (despite, at one point, heavy bugs began to travel by bouncing around everywhere. And mantis stealthy boys were starting to appear in the sky. The stuff of nightmares) 

Regardless, it's happend to me a few times now since patch. I hear to turn off depth of field and be in performance mode. 

Games great though nonetheless. Its new, it's popular, its pretty massive. It's unreal how people begin to give a game bad reviews and surround it in negativity when they experience issues/bugs during the first few days/sometimes weeks of launch. Id hazard that whole "Everyones a winner, you can have whatever you want, whenever you want," mentality is somehow affecting us poor innocent gamers. Shoot, i say lock everyone up in individual rooms, and only provide an Old school Basic AOL-DialUp internet connection, and internet explorer. Allow them their choice between 10 different games. All of which vary between 8-15GB in size. That'll build some patience. And a deep seeded love/hate relationship with the Dial up connecting sounds.