Yasuo + TF Gold Card Bug

Hey Riot. So for some reason when I wall Twisted Fate's stun sometimes, the damage doesn't go through but I still get stunned. And it is pretty obvious that I blocked it but I still get stunned. Please fix, I got killed 3 times because of it. Was chasing TF, I see him selecting his cards and I throw out my windwall as he throws his stun card, damage gets blocked but I still get stunned. :(