[Gameplay] Fizz is effected by cone based abilities during playful/trickster.
Annie was able to stun Fizz multiple times after he had activated playful and before he ever hit the ground, and a Kassadin was able to kill him mid playful with his slow. When he died during the ability the damage actually still went off at the appropriate time and the splash would effect enemies.
I am not sure if this is limited to cone abilities or even just these two champions but they were the ones that seemed to take effect. The cc and damage went through consistently, I would receive the damage and cc mid animation after other abilities had already missed me and even after the cones hit I would still dodge abilities before landing. I couldn't grab anyone to test it out in a custom with me but in the match it happened every single time with no exceptions.
I would like to test a few things out and see what the limit of this is but otherwise just bringing this to attention.