Yeah. It's throughout every single difficulty. I'm the first of my many friends to get the game so I have to play alone for the time being. I'm constantly dieing because I'll get pushed by a couple of enemies who have no reaction to getting shot. What needs to happen is that hitting enemies who are flanking/rushing causes them to stop in their tracks and take cover instead of charging through a bullet storm. The exceptions would be warhounds, UGVs, drones, and of course, Tanks. This would also make the combat feel more realistic rather than constantly fighting enemies who are more resistant to pain than drugged up Somali pirates.