A Rek'Sai Tunnel Bug !!

In normal game, we found a bug on Rek'Sai tunnel : it was impossible to delete a Rek'Sai tunnel, no matter of the extremity. It was a big unfair problem into the game cause it was possible for Rek'Sai to use her ultimate into this tunnel... so impossible for our team to prevent us from the gank on this lane... No problem on the other tunnels. Has somebody already saw that?