there is an issue with archer mobs still where archer mobs will instantly fire an arrow at a person as soon as they come into range. to duplicate this issue: aggro an archer mob. run away, out of range of the mob. stop running. notice that as soon as the archer mob reaches it's max range it will instantly fire an arrow at you without having to load first. the mob essentially has loaded an arrow while it is running, and then instantly fires it when reaching max range. the mob should have to stop and load its bow before firing an arrow.