Lately I've noticed few times some weird stuff that smells a bit like hacking.

It's when the enemy spams Left Mouse Button to keep basic-attacking. You know, slash-slash-slash-slash. When I tried to power attack them, they didn't stop their animation even for a fraction of second and still blocked it. Auto-block?
Did someone encounter something like this?

Me:D but enemy zerk doing power atack and me in same time he hit me, i hit him but i take him 1300dmg
without rejection