Stun bug between Udyr and Ahri

I was playing Udyr against an Ahri and found out that if she charmed Udyr during his Bear form(causes stuns on hit) The moment the charm would end, udyr would instantly auto attack the air and stun ahri no matter where she is. and i did this bug all match long and saved others and noticed it wasnt a fluke. I could stun ahri from a ways away because she charms me in bear form.