Swagger UI not working with Post ICommand

[solvingproblemswithtechnology]

When I register an ICommand using UseDispatcherEndpoints I expect that swagger asks me for a JSON with the command. Instead of it, the UI shows me the request like a string field and after I wrote something the field gets cleared.

My Code:

return WebHost.CreateDefaultBuilder(args)
    .ConfigureServices(services =>
    {
        services.AddConvey()
            .AddWebApi()
            .AddWebApiSwaggerDocs(options => options
                .Enable(true)
                .WithName("Order Sample API")
                .WithTitle("Order Sample API")
                .WithVersion("1"))
            .AddCommandHandlers()
            .AddQueryHandlers()
            .AddInMemoryCommandDispatcher()
            .AddInMemoryQueryDispatcher()
            .Build();
    })
    .Configure(app =>
    {
        app.UseSwaggerDocs()
            .UsePublicContracts<Contract>()
            .UseDispatcherEndpoints(endpoints => endpoints
                .Post<PlaceOrderRequest>("api/Orders")
            );
    })
    .ConfigureLogging((ctx, builder) =>
    {
        builder.ClearProviders();

        if (ctx.HostingEnvironment.IsDevelopment()) builder.AddConsole();
    })
    .UseSerilog((ctx, builder) => builder.Enrich.FromLogContext()
            .ReadFrom.Configuration(ctx.Configuration)
            .WriteTo.Async(async => async.Debug())
            .WriteTo.Seq("http://localhost:5341"), writeToProviders: true)
    .Build().RunAsync();

[GooRiOn]

Related to issue #25