Tahm Kench unable to use W on Caitlyn

my last game i was able to use W on every other champion, including our AFK riven in base. i could W minions, 3 stacked champions, etc.

i couldn't use it on the only champ i relaly needed to, my ADC Caitlyn for no good reason. she could use my ult with me, and everything else was fine, i turned autocast on and off too, but nothing worked, she would stand still and i would just stand there spamming my W key and nothing would happen.