[BUG] Ingame recall bug

The bug occured in-game in a EUW server.

So I was playing Vi in summoner's rift. When i was at bot lane , defending the Inner Turret vs an Akali. I engage on her with my q while she was in the bushnear the turret. To defend it she pops her W. I I go away because i dont want to be bursted, at the same time her W fades away. But then I hear a recalling noise coming from the Akali. The thing is i didnt have vision or whatsoever. I q into the bush and she was recalling when i killed her.

I tried reconstructing it ,but it was in vain. Maybe its rare idk. i would rate it lower then 1/10