Invisible Wind Wall

Very simply I was playing Jhin for the first time and used his ult, shot three times and they disappeared. The fourth I aimed some where else and it was fine. I come out of the ult screen and there was a wind wall (Yasuo) where the first three had gone. Now maybe I just hadn't noticed because it was literally my third time using the ult, but it might be worth a check for some of the devs. Thanks!