Affiliate Token in oAuth process

Hi!
While using the MusicKit JS with this conf:

Code Block MusicKit.configure({
    developerToken: at,
    affiliateToken: 'XXXXX',
    campaignToken: 'musickitjs',
    app: {
      name: 'ZZZZ'
    }
  });

Code Block
MusicKit.configure({
developerToken: at,
affiliateToken: 'XXXXX',
campaignToken: 'musickitjs',
app: {
name: 'ZZZZ'
}
});

The affiliate token is not used then when the user is not having an Apple Music subscription and "try it".
While the "subscribeURL" in the MusicKit object is:
https://finance-app.itunes.apple.com/deeplink?at=XXXXX&ct=musickitjs&p=subscribe&app=music

During the user flow, the final URL sent to upgrade to a paid subscription is:
https://finance-app.itunes.apple.com/deeplink?p=subscribe&source=webPlayerUpsell&itscg=50000&itsct=web_player&app=music

As you can see, there's no more the affiliate token and the campaign token. While it should be there...