[Gameplay] Tryndamere Ult Bug

Sometimes, Tryndamere's ult goes on cooldown when used, but he still dies. I just observed this when playing verses a Braum whom ulted me as I played Tryndamere right after my own. I died rather instantly to the crowd attacking me, but my ultimate, however, went on cooldown so I know I did not just time it wrong. Funny thing is, during my death screen (all greyed out) I could still hear the sound of Trynd's ult going on. Please fix this bug, at least make it not go on cooldown if he uses it and dies in the middle of it. Kind of like the path 4.20 bug tbh where trynd coud die during his ult due to the smite dealing pure damage instead of true.