Hecarim Devastating Charge & Base Gates Bug

When Hecarim uses his E - Devastating Charge against an enemy, he can knock them through the base gate and travel through with them, which should be impassable terrain for Hecarim. I saw this happen twice in one game, on lower purple side gate. First champion hit by Hecarim was Graves, the second being Soraka.

Might be an odd one to fix, because the enemy can travel through the gate, but Hecarim cannot.

Edit - Perhaps let Hecarim do this kind of interaction to any thin wall, like Nidalee's Pounce and Riven's Broken Wings.