ASP.Net MVC Custom 404 for long URL path

Question

I have asp.net mvc RouteConfig as below, it's default one

public static void RegisterRoutes(RouteCollection routes)
{
   routes.IgnoreRoute("{resource}.axd/{*pathInfo}");
   routes.MapRoute(
    name: "Default",
    url: "{controller}/{action}/{id}",
    defaults: new { controller = "Home", action = "Home", id = UrlParameter.Optional }
    );
}

In the web.config I have enabled the customerrors as below

Web.config

      <customErrors mode="On" defaultRedirect="/Error/Error">
      <error statusCode="404" redirect="/Error/NotFound" />
      <error statusCode="500" redirect="/Error/Error" />
      </customErrors>

Error Controller

public class ErrorController : Controller
{
    public ActionResult Error()
    {
        if (!string.IsNullOrEmpty(Request.QueryString["aspxerrorpath"]))
        {
            return RedirectToAction("Error");
        }
        return View();
    }
    public ActionResult NotFound()        
    {
        if (!string.IsNullOrEmpty(Request.QueryString["aspxerrorpath"]))
        {   
            return RedirectToAction("Home", "Home");
        }
        return View();
    }
}

When I hit the URL https://localhost:44351/a/a/a getting 404 and it's coming to Error controller, NotFound action from there it's redirecting to "Home" controller and "Home" action.

But when I hit the URL with more slashes in deep like https://localhost:44351/a/a/a/a getting default HTTP Error 404.0 - Not Found It's not routing to Error Controller, NotFound Action.

How to handle any level deep path to handle the custom 404?