BUG with Riven R/Pantheon E skillshot aim!

Hi community, I start saying that I don't speak english so my language will probably suck.

You can see the BUG in this Gif (unfortunately the video uploaded is faster, i don't know why, but you can clearly understand it)

https://giphy.com/gifs/3o6Zt5QBMbABWKjdXW

Well, the Aim of the R of Riven , when you are next to tower/walls, get bugged and you can't move it off.

Have anyone just reported this bug?