It seems to me at least, (since the Halloween update) there is now an increased delay between using the stolen skill and gaining stealth, thus the auto-attack does not stop like its supposed to and it fires a final shot as you stealth. I mostly noticed it because even turning off my AA I still find myself having to wait for stealth to be applied to then use Deaths Judgement, wasting precious dps time. Using the timing I have come accustomed to will result in firing a deadly aim/brutal aim.