Yep. I don't understand the humans reactions, a couple of times they've 
clearly saw me, but took them a while to say something or even to attack, it feels so strange, unless they are making sure we are infected or something, but still not the impression it gave me. Felt more like a technical flaw to me. Specially cause on my first human meeting they were not reacting slowly that, they were aggressively flanking, throwing molotovs and shit.
Still not ruining the experience for me though, I thought I was gonna hate this game, but I'm loving it, it has the proper change of pace/enemies, the clunkiness of camera and aiming feels intentional and wonderful for me.
Have a long way to go though, it says 40% on the save, I wish I had not looked there 
