Blitzcrank Knocks up Fizz out of playful trickster

Fizz gains invulnerability and the advantage of him using playful is to dodge moves, however since blitzcranks is an autoattack I guess it still goes through. I thought maybe i was timing it badly but Riven's q wouldnt knock me up or jinx's w wouldnt slow me.

Maybe this was intentional, but the animation suggests otherwise ( I hope onto my pole then get knocked off)

(link button isnt working either) https://www.youtube.com/watch?v=Wa1A9pBtpv8 https://www.youtube.com/watch?v=6w8FFQKIfqU