Hm the back to me can be, because there is a mechanic for the AI to mainly focus head shots and when I'm so close it seems that my vital spot is out of range.lol wtf, first time seeing this
looks like he is trying to run away standing still while giving the back to u and kinda being pushed
I watched the video again today and there is a second aspect.
When the bandit swapped his missile weapon to his melee weapon and I was running at him again, he hasn't had any push back. So it seems that the stance for throwing weapons causing this weird push back effect.
Also as I mentioned this problem I've played a character focused on throwing so maybe the problem can be found there.