[Gameplay]Jarvan ult Walls Intentional or bug?

I was playing in a ranked game.I flash in and ult getting 3 members of the enemy team,my jungler ult's on one of the enemy's . ult channel gets canceled instantly and i get pushed a bit to the side.Basically I ulted,got stuck inside the walls and get pushed or moved to the side(think of into a wall but not reaching the other side,you just move a bit).

Steps to reproduce 1)3 players must be in game** Ally** **Ally ** Enemy champion 3) and must be level 6 3. starts channeling ultimate 4. ults on a nearby enemy(walls must hit galio) 5.luck 5. channel gets stopped

This can most likely work with any channel like ult, ult, ult, ult.

Bug or intentional ( still funny)