[GAMEPLAY] Jarvan IV Ult and Malphite Ult Glitch

I played a 3v3 ranked with Malphite. My teammate played Jarvan IV. At two instances of the game, as soon as I ulted at the same time that J4 ulted, my ult glitched out and was not able to fully transpire. Having doubts of the first moment, I engaged in another team fight whereas this time, J4 had ulted first. Following him, I tried to ult the people he trapped but inevitably found myself rammed into his wall. I don't remember this ever happening in the past. Unfortunately, my recorder did not work. I also tried to reproduce the issue but could not.