Ornn e vs terrain bug

Ok so i really really like Ornn so i have played him sometimes now but his e dosnt work as it should.

I was playing 3v3 and was vs an Anivia and when she used her wall and i used my e should the terrain be destroyed right ? but no just the texture will be removed and the wall will still be there for like 2 sec or so and this is really annoying and something else that i found out was that if you use your e right as Anivia uses her wall then wont the wall be destroyed and it wont become any shockwaves. Plz fix this as fast as possible i dont know if it works on other player made terrain but i guess it does and if you are vs an Anivia or any other champ that have terrain then will this be really annoying.