ASP.NET Web API Stack Trace Not Available - UseProblemDetails

It has been a while since I developed an API so bear with me. I have created a new web API in the new .NET 5.0 framework. I have tried using Hellang.Middleware.ProblemDetails nuget for my error handling middleware. Seems to be working, but I cannot get any stack trace details to show for life the me, is there something I am missing?

I can only get the following details:

{"type":"https://httpstatuses.com/404","title":"Not Found","status":404,"traceId":"00-02c4e89a990c5745bc4250cfad83d5e3-bb8c1dab98b44a44-00"}

Here is relevant code from my startup class:

    public void ConfigureServices(IServiceCollection services)
    {
        services.AddDbContext<CoreDbContext>(op => op.UseSqlServer(AppSettings.DBConnectionString).UseLazyLoadingProxies());
        services.AddControllers().AddNewtonsoftJson(options =>
            options.SerializerSettings.ReferenceLoopHandling = Newtonsoft.Json.ReferenceLoopHandling.Ignore
        );

        services.AddProblemDetails(opts =>
        {
            // Control when an exception is included
            opts.IncludeExceptionDetails = (ctx, ex) =>
            {
                // Fetch services from HttpContext.RequestServices
                var env = ctx.RequestServices.GetRequiredService<IHostEnvironment>();
                return env.IsDevelopment();
            };
        });
    }

    
    public void Configure(IApplicationBuilder app, IWebHostEnvironment env)
    {
        if (env.IsDevelopment())
        {
            app.UseDeveloperExceptionPage();            
        }

        app.UseProblemDetails();

        app.UseHttpsRedirection();

        app.UseRouting();

        app.UseAuthorization();

        app.UseEndpoints(endpoints =>
        {
            endpoints.MapControllers();
        });
    }