method is called 2 or 3 times in each request .NET MVC

Question

I'm facing an issue in a project that I'm currently working on, I'm using ASP.NET MVC.

The scenario as follow:
- I have a login page (Username and Password).
- Whenever I navigate to localhost:5588/login, the below action method will be called 2 or 3 times (I'm using a Break Point inside this method to catch the call).

public ActionResult Login()
{
     return View();
}

The question is, why this method is called 2 - 3 times whenever I enter the login page ?

PS #1: Not only the Login page is being called 2-3 times, also each Action method have the same issue.
PS: #2: I'm using the below route:

public static void RegisterRoutes(RouteCollection routes)
{
    routes.IgnoreRoute("{resource}.axd/{*pathInfo}");

    routes.MapRoute(
        name: "Default",
        url: "{controller}/{action}/{id}",
        defaults: new { controller = "Login", action = "Login", id = UrlParameter.Optional }
        );       
}

UPDATE:
This issue happens only on Google Chrome!

Answer 1

Issue might happen, because browser can pre-load page, before you hitting Enter. In this thread posted solution, how you can understand that it is pre-load request: HTTP header to detect a preload request by Google Chrome

Answer 2

显然，有些东西将您的操作方法称为3次，强烈建议您打开chrome开发人员工具，导航到网络并检查流量，如果它们是XHR请求，您也可以跟踪它们的来源，否则就处于黑暗中。

Answer 3

I once had this issue and found I had something like this

src="#"

in my image tag or check for any other markup that could be accidentally referencing the page like Script references, image references, css reference etc

Answer 4

This is the correct answer and this actually solved the issue. [Special Thanks to my friend Mohammad Aldayem for the great finding].

Based on an issue posted on Chromium Issue Tracker ( https://bugs.chromium.org ), the issue was in the " favicon.ico " in the _Layout.cshtml page. Because Chrome requests favicons on every request on pages that don't have a favicon.

And here are the links for this issue while using Google Chrome:

Link #1: https://bugs.chromium.org/p/chromium/issues/detail?id=64810
Link #2: https://bugs.chromium.org/p/chromium/issues/detail?id=39402