Sona sound issues [Gameplay]

I noticed that whenever the game ends, during the moment that precedes the appearance of the victory/defeat screen, Sona's taunts/laugh/joke cannot be heard anymore. It used to be possible and so far she is the only champ I've noticed that seems to have that issue.

Also, it seems that she cannot spam them, unlike many other champs. You could use the Joke three times in a row and only hear it once.