Loading multiple SoundEffects in QML randomly crashes the application

The following example randomly triggers this error: The program has unexpectedly finished.

Sometimes the application starts correctly and everything works as expected. Sometimes the window isn't displayed at all and the app crashes.

I couldn't reproduce this behavior using only one SoundEffect.

import QtQuick
import QtMultimedia

Window {
    width: 100
    height: 100
    visible: true

    SoundEffect { id: beep; source: "file:beep.wav"}
    SoundEffect { id: swosh; source: "file:swosh.wav" }

    Component.onCompleted: {
        beep.play()
        swosh.play()
    }
}

The .wav are attached (they are probably not the cause since they work individually).