Possible Kayn/Aurelion bug

Aurelion's Coment of Legend describes him as "being able to see over walls". Kayn also has a mechanically identical feature while phased during Shadow Step (although it is not described). Until recently I've always assumed both effects were mechanically similar to having a mobile Clairvoyance/Hawk Shot/Heightened Senses, but I've since been ambushed by an enemy that seemed to appear out of nowhere.

Reproduction steps are easy: http://i.imgur.com/RRMZPyi.png

There is an enemy dummy in that brush, but the fog is removed and I can see an enemy on the other side of the brush.

The possible bug:

1. The brush should still be shadowed in fog to indicate that the area is not revealed.
2. I should not be able to see beyond the brush - the effect only says I can see through walls. If both the brush and the area beyond were in shadow, there'd be no illusion the area is safe.
3. Units within the brush should be revealed and the effect should just read "unobstructed vision". This would be consistent with all other PBAOE vision abilities, and is what is currently expected based on how the fog of war behaves.