MediaElement.SetSource() only starts audio if delay of 1000ms added

Question

When streaming audio from a DLNA source the audio won't start if the wma file is opened and immediately set to the MediaElement source.

Here is the code:

var stream = await songFile.OpenReadAsync();
await Task.Delay(1500); //Without this delay audio will not start
this.player.SetSource(stream, songFile.ContentType);

Here is the XAML:

<MediaElement x:Name="player" AutoPlay="True" AudioCategory="BackgroundCapableMedia" AreTransportControlsEnabled="True" CurrentStateChanged="player_CurrentStateChanged" MediaEnded="player_MediaEnded"/>

I don't want to introduce this delay. Any ideas how this can be done?