Unity.Notification.showNotification() send a notification twice

[Thomas]

When I use the Unity.Notification.showNotification() function in my own webapp I have each notification twice.

For exemple :
function musicPlayerSetup() {
    Unity.MediaPlayer.init("Deezer.com");
    var i = 0;

    setInterval(wrapCallback(function retry() {
 Unity.Notification.showNotification("Number : " + i,"Test",false);
 i = i + 1;
    }), 5000);
}
It sends 2 notifications for each "Number"