Attack move cancel does not operate at the fficiency that it used to operate. It is now slow >.05s

When something has just moved out of attack range and a cancel was issued, why do many players champions move so far before coming back even if they have been clicking furiously to not continue to attack. My hypothesis (and it's been pre-tested) is that this is a bug. You can click an object that has moved out of range and click a nearby object, but the cancel does not happen within a normal time frame of a typical attack cancel. The new time frame is around 0.5 seconds, plenty of time to be out of position (Zven and Doublelift) and lose the game because the enemy can capitalize. This is potentially game breaking and easy to test and see in professional VODS.