[GAMEPLAY] Queueing up Kassadin's Force Pulse [E] while Rift Walking [R] causes it to fire backwards

When playing Kassadin, if you use your Force Pulse during the animation of Rift Walk, it sometimes causes Force Pulse to land backwards after finishing the Rift Walk. It seems as though the spell is trying to land towards where you clicked, instead of the direction you fired it before Rift Walk's animation finished.

Steps to recreate:

1. Level Kassadin to 6, taking at least 1 point in Force Pulse and Rift Walk.
2. Rift Walk in any direction at max range
3. Before the animation finishes queue up Force Pulse in the direction of the Rift Walk but shorter than the distance of the Rift Walk.

The bug seems to only happen when the Force Pulse is issued behind where the Rift Walk is supposed to land.

I cant upload a video, I don't have a video recorder, but it seems as though other people in this thread are having the same issue.