Woad King Darius 'W' Bug (25/8/2015 Patch 5.16)

I was gifted Woad King Darius for the recent sale and there is a bug with the 'w' The bug is simple.When you attack and use your 'W' as an auto attack reset there is no animation to it, Darius just stands there but the damage goes through. It happens all the time while im using the Woad King Darius skin. To re-create it just auto attack and use 'W' right after it , you should see the bug.