[GAMEPLAY] Darius's ult failing over a wall.

I was in a game where Darius was trying to ult Oriana over a wall [we had vision over the wall]; the base wall, where there's the little opening one side can walk through.

He leaped into the air, then came down without dealing damage. It didn't make sense. Was pretty weird. It may be: Oriana moved too far away? Or, we lost vision during the ult windup? I didn't think these things mattered, but everything else seemed ideal.