Adding a playlist via "QueuedLavalinkPlayerExtensions" does not work

[555KIV]

When calling the PlayAsync method with a passed playlist of the TrackLoadResult type from this Extension, tracks from the playlist other than the first one are not added to Lavalink

The reason is most likely this:

When the first track is added to Lavalink, the PlayAsync method will return 0 and queueOffset will not be null. Then in the second iteration, the operator ??= will see that the left operand of queueOffset is not null, and accordingly discards the right operand without calling the method

The source file: https://github.com/angelobreuer/Lavalink4NET/blob/dev/src/Lavalink4NET/Extensions/QueuedLavalinkPlayerExtensions.cs#L29

public static async ValueTask<int> PlayAsync(this IQueuedLavalinkPlayer player, TrackLoadResult loadResult, CancellationToken cancellationToken = default)
    {
        cancellationToken.ThrowIfCancellationRequested();

        var queueOffset = default(int?);

        if (loadResult.Playlist is null)
        {
           
            queueOffset ??= await player 
              .PlayAsync(loadResult.Track!, cancellationToken: cancellationToken)
              .ConfigureAwait(false);
        }
        else
        {
            foreach (var track in loadResult.Tracks)
            {
               // There's a problem here
                queueOffset ??= await player
                  .PlayAsync(track, cancellationToken: cancellationToken)
                  .ConfigureAwait(false);
            }
        }

        return queueOffset ?? throw new InvalidOperationException("No track is present.");
    }