[Gameplay] Kha ´Zix Wings disappear.

Hello there,on my recent matches i noticed that sometimes Kha´Zix´s evolved Wings just disappear. I have no idea when exactly this happens. I also wasn´t able to capture a Screenshot so far. It happened on Summoners Rift and Howling Abyss.

I tried certain things in a custom game,in an attempt to reconstruct the Bug. Dieing while having the Wings Evolved doesnt make them disappear. Evolving other Abilities (even in a different order) also doesnt make them disappear.

Its a rather minor,but distracting Bug,as some may think that Kha Zix doesnt have his Wings evolved,due to the wings disappearing.