A bug about Veigar final boss

I suppose that those who played Veigar before patch 6.9 will remember the passive of his Q, when killing a minion or monster, piled up 1 point of AP, with the skin "final boss" this accumulation issued an animation and special sound. Since version 6.9, they changed that passive, and now earns AP up walking. My issue is that the skin "final boss" animation only occurs when assassinating these units with Q, and I wanted to ask Riot that fix this, and animation ever happen to Veigar win an accumulation for passive.

only this, bye*[slayer-jinx-catface]*