Mech Maliphite Chroma

I am not sure if anyone has posted this before but, while using a Chroma skin on Mecha Maliphite I have noticed that the ability W does not render correctly. On the normal Mecha Maliphite skin using his W make him pull out "brass knuckles" but while using a Chroma the use of W does not give "brass knuckles" it only makes his hands glow. This makes me kinda mad because the brass knuckles look is one reason I bought Mecha Maliphite. Is this somthing that is happening to multiple people or just me?