WordBoundary event not called when using Neural Text to speech container

Hi,

I'm trying to use the Neural Text To Speech containers from a C# project.

I have the container running locally, and I'm able to get text read out loud via the container using Microsoft.CognitiveServices.Speech v1.36.0.

My issue is that I need the WordBoundary event to be called back. But when using the local container this event is not invoked at all.

If I switch to use my Azure subscription ( Speech.Config.FromSubsribtion(...) )it works as expected.

My sample code for demonstrating the issue

async static Task Main(string[] args)
{
    var speechConfig = SpeechConfig.FromHost(new Uri("http://localhost:5000"));
    // The language of the voice that speaks.
    speechConfig.SpeechSynthesisVoiceName = "da-DK-JeppeNeural";
    using (var speechSynthesizer = new SpeechSynthesizer(speechConfig))
    {
        speechSynthesizer.SynthesisStarted += (s, e) =>
        {
            Console.WriteLine("Synthesis started.");
        };
        speechSynthesizer.Synthesizing += (s, e) =>
        {
            Console.WriteLine($"Synthesizing, received an audio chunk of {e.Result.AudioData.Length} bytes.");
        };
        speechSynthesizer.WordBoundary += (s, e) =>
        {
            Console.Write($"Word \"{e.Text}\" | ");
            Console.Write($"Text offset {e.TextOffset} | ");
            Console.WriteLine($"Audio offset {(e.AudioOffset + 5000) / 10000}ms");
        };
        // Get text from the console and synthesize to the default speaker.
        Console.WriteLine("Enter some text that you want to speak >");
        string text = Console.ReadLine();
        var speechSynthesisResult = await speechSynthesizer.SpeakTextAsync(text);        
    }
    Console.WriteLine("Press any key to exit...");
    Console.ReadKey();
}