Rek'Sai's Indestructible Tunnel Bug

It looks like if there's a tunnel placed on certain spots on the map, it will be indestructible. Here's proof from Aphromoo's stream. https://www.youtube.com/watch?v=VD9tplsij_Y&feature=youtu.be

I also posted this bug a few months back but back then I only had screenshots from my own games on Reddit.

http://www.reddit.com/r/leagueoflegends/comments/2p496k/possible_reksai_bug_indestructible_tunnels/

From my other post and Aphro's stream, it seems that there is a certain spot in the Raptor camp that makes the tunnels unable to be destroyed. The only difference between the instance in my game and Aphro's game is that the tunnels are on the opposite jungle camp's side. Has this bug been confirmed by other people and Riot? I don't think Riot has addressed it and I can see how it can be potentially be abused in games and perhaps competitive play.