Hero could not pass through energy wall with R-Kayn inside.
The hero could not pass through the energy wall with the R-Kayn inside, even though Kayn himself could jump over this wall. There is no information about that on wikia. Game full of bugs.
start from 24sec
https://www.youtube.com/watch?v=HJKK_-F-p1c&feature=youtu.be
Knowing that the Kayn was an enemy, then maybe the gate wouldn't let an enemy through... but in the same way... why the turrets can not shoot hero (or just only Kayn inside) with Kayn inside or why any (in general) of teammates skills can not counter/not working on Kayn-R when he is inside of one of enemy champions. Why ex Veigars W not "stuning" (enemy) Kayn when he is passing through his cage inside other champ?