MaHuD 说:
It's possible that you lost sync with the server and you were actually blocking another direction. (This happens, call it bad luck)
I have it to.
I think I have the largest variation of this, because when I block it goes after two seconds to another direction (no auto-block), and when that happen in melee im so good as dead.
Also people say when I died like "fail block" and I saw on my schreen I blocked good.
But anyways I think its my bad connection.