[GAME-BREAKING] Vision over walls glitch.
Already reported said glitch in the respective place for it but I want to draw attention to this issue. Jax had no vision source onto xerath after he flashed out to the other side of the wall, xerath still got revealed for unknown reasons and jax proceeded to leap into him.
In a competitive ranked game (which it actually was) it might seal the deal for a win or a lose, so I just want as many people as possible to be aware of it.
Edit:
Tested with Flash and it might not be the cause. Really wondering what else could it be.
https://www.youtube.com/watch?v=0BLIzNocScE