Yasuo w bug vs katarina q

Very often i have noticed a problem with yasuos windwall vs a katarina q, if katarina throws the q you can block it as normal with windwall however, it seems to be very buggy if it bounces off a minion where the minion bounce goes through the wall. As a yasuo main i thought originally that it was a non projectile, but i have blocked it many times following. Just curious if this is possibly intended but im pretty sure it is a bug and i would love to see it fixed. Thanks