Updating Visual Effects

Hey, I recently played a game where I was against a Renekton in lane and at one point in the game, pushed him out of lane, losing vision of him with his ulti still active. The next time I saw him, I saw him with his ultimate still active so I assumed he had accidentally used it. When I tried to kill him, about 15 seconds later, he popped his ult and killed me... Hopefully things like this are fixed in the future (I sometimes see recall animations around enemy champions just walking into vision).