Ok, i've tried all day long and do not know, how this can be. I have a website on which i load jquery like that:

```
function my_script_loader() {
if (!is_admin()) { // only load for front end
    //Clear jQuery if already registered
    wp_deregister_script('jquery');
    wp_register_script('jquery', "http" . ($_SERVER['SERVER_PORT'] == 443 ? "s" : "") . "://ajax.googleapis.com/ajax/libs/jquery/1.11.1/jquery.min.js", array(), '1.11.1', '',true);
    wp_enqueue_script('jquery');
    } // End of if statement
} // End of Function
add_action('wp_enqueue_scripts', 'my_script_loader');

```

The expected result in the Dom is:

```
<script type="text/javascript" defer="defer" src="https://ajax.googleapis.com/ajax/libs/jquery/1.11.1/jquery.min.js">

```

Then i am doing the exact same thing on another website which is a subdomain:

```
function script_loader() {
if (!is_admin()) {
    //Clear jQuery if already registered
    wp_deregister_script('jquery');
    wp_register_script('jquery', "http" . ($_SERVER['SERVER_PORT'] == 443 ? "s" : "") . "://ajax.googleapis.com/ajax/libs/jquery/1.12.4/jquery.min.js", array() , '1.12.4', '',true);
    wp_enqueue_script('jquery');
    }
} // End of Function
add_action('wp_enqueue_scripts', 'script_loader');

```

The unexpected result in the Dom is:

```
<script type="text/javascript" src="https://ajax.googleapis.com/ajax/libs/jquery/1.12.4/jquery.min.js?ver=1.12.4">

```

I have disabled plugins and removed all scripts but the script is not deferred. How can that happen?
Thanks for your interest.
theo