FB.Event.subscribe ("edge.create", function ()) works with the Link button, but not with the Link field

Question

FB.Event.subscribe ("edge.create", function ()) works with the Link button, but not with the Link field

I created two test pages: one with a Facebook Link button and one with a Link field. When someone clicks “Like”, I want the image pixel to be running, so we can select it from the web server logs.

It works great with the Like button, but for some reason not with the Like drawer. Both Similar plugins are included as versions of XFBML.

The code I use for both when it comes to starting a pixel call:

<div id="fb-root"></div>
<script type="text/javascript">
<!--

window.fbAsyncInit = function()
{
    FB.init({
        appId: '{{appId}}',
        status: true,
        cookie: true,
        xfbml: true 
    });

    FB.Event.subscribe('edge.create', function(){
        var tracking_pixel = new Image(1, 1);
        tracking_pixel.src = '{{image_pixel_url}}';
    });
};

(function(d){
    var js, id = 'facebook-jssdk', ref = d.getElementsByTagName('script')[0];
    if(d.getElementById(id))
    {
        return;
    }
    js = d.createElement('script');
    js.id = id;
    js.async = true;
    js.src = "//connect.facebook.net/en_US/all.js";
    ref.parentNode.insertBefore(js, ref);
}(document));

// -->
</script>