[GAMEPLAY] Cho'Gath W silence through "invulnerability" frames

In a recent ARAM game, our ally pointed out a few strange interactions with 's silence, which I saw a few instances of when I paid closer attention.

received a full silence from 's W (Feral Scream, I think) during the first activation of his Playful/Trickster. He also received a full silence IN ZHONYA'S HOURGLASS ! from the same spell. Perhaps unrelated, I was playing , and I went to kick -> Cho'Gath into our fountain turret (because we were losing so badly I had time to notice these things), and my flash went off but my kick did not. The kicker (heh) was, I was silenced by 's W at the time, which is why I believe my kick did not go off. It could've been unrelated, but worth mentioning all the same.

This is easily testable, as reports (and I was witness to) a full W silence in 's Playful/Trickster "invulnerability" cast, and similarly in the middle of a activation. The mid- silence may have simply been the silence tooltip popping up (the empty chat bubble icon) without the effect actually occurring, but the other strange incidents lead me to believe this may not be the case.

Hope this get the help it needs! I didn't have the foresight to snap a screenshot in the midst of the game. Swoop