IN-GAME bug: Fizz E skill unusable

Was just in a game and i had fizz. There was some weird interaction in a teamfight and when i spawned playful trickster could not be used. Its icon was blacked out and when i was trying to use it, it said "ability not learned". It was not a keybind problem. It just buged out from a CC interaction and the system recognized that ability as not learned even though it had 5 points which still were there under the grey E icon. Later when i got cc'ed again, it was available again.

The opponent team had Karthus, Pantheon, Zac, Rammus and Singed. Since it was an aram brawl, i have no idea which is for sure responsible. My guess on how the fight went would be rammus taunt had something to do with it, backed up by the fact that he was taunting me most game, but again it is only a rough guess. That's all the help i can offer to the bug team with the tools i have.

I hope this bug doesn't get ignored until many people notice it and practically force the bug team to deal with it.

P.S. 1: I read the bug report format, i chose not to follow it and would like to comment on it. We are not obligated to report bugs, in fact we offer a free (unpaid) service which is massively unfair to players that report bugs for obvious reasons. The least you can do is not be picky asking for a proper format. The fair thing to do is offer something in return. Until then, we don't work for riot. We just let you take advantage of us occasionally, because we love the game. Don't be picky.

P.S. 2: Guess if i had a replay, i could say for sure what interaction caused the bug cough cough