Gameplay Jarvan IV Ult Glitch

So I am not sure why this has not been looked into yet. When Jarvan IV uses his ultimate he leaps onto an enemy and creates an impassable wall of terrain around him and his enemies. However it seems like on the left side of his wall enemies and allies alike can just walk out of it. The left side. on the very left side they can walk out of his arena which is supposed to trap them. It looks like the gap isnt quite closed on Jarvan's wall and i was hoping in the last patch they would have fixed it. (It really is a BUMMER when you trap someone and they just walk away).

To reproduce just use Jarvan's ultimate and walk out the left side. (I believe a good fix would be to treat his ultimate like anivia's wall, enemies dont walk if they click outside his barrier. Currently if they click outside the barrier they walk to the edge of the barrier.)