I have a problem accessing PublishedContent inside a custom Middleware. I dont know how to register it the right way so I can access the backoffice content...

Middleware:

public class TestMiddleware
{
    private readonly RequestDelegate _next;
    public TestMiddleware(RequestDelegate next) { _next = next; }

    public async Task InvokeAsync(HttpContext context, IUmbracoContextFactory umbracoContextFactory )
    {
        using (var umbracoContextReference = umbracoContextFactory.EnsureUmbracoContext())
        {
            var contentCache = umbracoContextReference.UmbracoContext.Content;

            var root = contentCache.GetByXPath($"//root").FirstOrDefault();

            var r = root?.Name ?? "null";
        }

        await _next.Invoke(context);
    }
}

Startup Filter:

public class TestStartupFilter : IStartupFilter
{
    public Action<IApplicationBuilder> Configure(Action<IApplicationBuilder> next) => app =>
    {
        app.UseMiddleware<TestMiddleware>();
        next(app);
    };
}

Startup:

    public void ConfigureServices(IServiceCollection services)
    {
        //services.AddTransient<IStartupFilter, TestStartupFilter>();
        services.AddUmbraco(_env, _config)
            .AddBackOffice()
            .AddWebsite()
            .AddComposers()
            .Build();
        services.AddTransient<IStartupFilter, TestStartupFilter >();
        services.AddMvc().AddFluentValidation(fv => fv.RegisterValidatorsFromAssemblyContaining<ShopUserCommonView>());
    }

When I try to get the content from lets say a View, I get the content, the problem is only when trying to do it from a Middleware.

I get the instance of IUmbracoContextFactory but when I try to get the content out of "UmbracoContext.Content" (variable root) it is always null...