[Gameplay] People keep walking out of Jarvan's ultimate
It was a battle royale, so i can't give you any details because there were too many things happening at once to see anything properly. But if it helps replicate the bug, i can say that the one that walked out, Janna, seemed to be under the effect of a (slow) debuff. So i'm guessing that a debuff may override Jarvan's wall effect.