Glitched Jupitel Thunder

[F.x]

theres a glitch with Wizard's Jupitel Thunder,

it is suppose to push the enemy back after u cast it. every time when i cast it the animation of the enemy is shown that it has been pushed back but after the lightning animation of JT is over the enemy teleports back in my face and hit me. it TELEPORTS!! it will disappear after the lightning animation and reappear in my face...i've put up a icewall between the enemy and i during the lightning animation but it will reappear in my face passing through the wall, (it was a minorous, icewall effects it) my friends have witnessed this so its not just me.
is there anyway to fix this??? or am i gonna have to change character...