Code

#include <QApplication>
#include <QPushButton>
#include <QSoundEffect>

int main(int argc, char *argv[])
{
    QApplication app(argc, argv);

    QSoundEffect effect;
    effect.setSource(QUrl("qrc:/boom.wav"));

    QPushButton button("Explode");
    button.show();
    QObject::connect(&button, &QPushButton::clicked, &app, [&]{
        effect.play();
    });

    return app.exec();
}

Steps to reproduce

1. Build and run the attached example
2. Click the button to start the sound effect
3. Click the button again while the first effect is still playing

Expected outcomes
The 2nd click plays the whole effect normally.

Actual outcomes
The 2nd click produces a short audible glitch followed by silence.

Workaround
Instead of keeping the QSoundEffect around and playing it repeatedly, create a new QSoundEffect for each play and delete it after.