Not much to say really, he missed his first 2 Qs then his glowing yellow chair... thing... vanished. There was still the trail around it so it wasn't impossible to dodge but still harder.
His items at the time were 
He was also supporting a Kalista and was bound to her.
I do not know how to reproduce this. I didn't get any screen shots.
yeah its a bug with the visual effects riot knows about it and it happens sometimes
i once played a game with morg snar being invisible as an adc it was annoying i had to go of her cast animation some other visual bugs are blue boxes over champs towers and abilities and abilities like maokais ult swains ult and fiddle sticks ult showing there animation the whole game weather it was on or not
other common bugs are skill shots not hitting targets charging skill shots like varus and xerath q becoming on permanent cooldown and knock backs that make you go threw walls like lee ult or blitz q makeing you get codemed in the wall
it sux when this happens but riot isnt perfect and its probably a deep bug in leagues code so it would take a massive update to fix something that barelly happens or doesnt impact the game that much
