Aatrox's w should show for everybody else besides him and target

As said in the title when playing with a friend and he hit somone with w I started to back up because I could not see he hit him and thought he would escape, but no he came back and we did kill him. Also when aatrox was on the enemy team and used w on my ally I could not see him hit by it. Please riot just as the title said this should work and help aatrox set up with his team alot more.