Ios doesnt play from queue

Hello,

i have impelentation of crossmedia manager and i have been experiencing issues with the player on ios. It plays once i pass the file as a parameter but it doesn't if i just add it to the queue and then trz to play. It works very well on android but not on ios. I really don't want to have two implementations. Plus i have been experiencing some buffering on ios.

```
try
{
Console.WriteLine("cleaning");
await CrossMediaManager.Current.Stop();
CrossMediaManager.Current.Queue.Clear();
Console.WriteLine("playing " + filename);
CrossMediaManager.Current.ClearQueueOnPlay = true;
CrossMediaManager.Current.RepeatMode = RepeatMode.Off;
CrossMediaManager.Current.Notification.Enabled = false;
_mediaItem = new MediaItem(filename)
{
Album = detail.NameCz,
AlbumArtist = detail.Narrator,
DisplayDescription = "description to be filled",
DisplayTitle = "title to be filled",
FileName = language + " " + localTrack,
Title = filename,
MediaUri = filename,
Image = ArticleImage
};
if (Device.RuntimePlatform == Device.iOS)
{
PlayFile(filename);
}
else
{
CrossMediaManager.Current.Queue.Add(_mediaItem);
CrossMediaManager.Current.Play();
}
}
catch (Exception ex)
{
_ = LangUpGlobalExceptionHandler.LogException(ex);
if (LangUpNetworkDelegate.IsOnline)
{
NotificationService.ShowToast(
"Při přehrávání se vyskytla chyba, zkuste to později prosím.");
}
else
{
NotificationService.ShowToast(
"Problém s připojením k internetu, zkuste to později prosím.");
}
}

```

No repository files or tests are named. Start by reproducing the iOS path that adds the MediaItem to CrossMediaManager.Current.Queue and calls Play(), then compare it with the direct PlayFile(filename) path; done means queued playback works on iOS without the reported buffering problem.

Written by the indexing model from the issue text.