When rematching in QM or Friend Match, the sound effect that plays with the winner animation will sometimes start looping in the background for the entire next game. It plays every few seconds until the game is done.
It happened with the sound of Setsuki’s kunais (fwoosh) and the sound of Degrey’s ghost (booo).
Steps to reproduce:
Rematch in QM or Friend Match. Rare occurrence and seemingly random.