Howling Abyss Map Bug EXPLOIT

I like this YouTube channel and don't want to get them in trouble, but at the same time I feel like this really needs to be fixed...

There's apparently a place you can merge into the walls in the ARAM map that makes you, more or less, entirely invisible. You can attack enemies and channel abilities from this place. I suppose it's just an error dealing with how the mesh (if that's the right word) of the visual map and the pathing (?) map match up. That being said, I'm sure it won't be an easy fix, but I felt like I should make sure it's known, either way.