Lux bug or anivia became a ghost?

So during a game i found a bug that a casts Q exactly on a walking and it bypasses her without affecting her at all...(no dmg, no cc)...(yes she didnt have spellshield)...

edit: Leona's e worked fine

below there is a link to the gif i made from the hightlight i recorded (hope it works)

http://i.makeagif.com/media/6-29-2017/6I-2s2.gif