wp_print_scripts runs twice

Dear Support team,

I am currently using a child theme.

I am filtering the different JS scripts, page by page.

So, I used to following function, in order to display which are used:

// Finding handle for your plugins
function display_script_handles() {
    global $wp_scripts;
	$id=0;
	if(current_user_can('manage_options') && ! is_admin()){ # Only load when user is admin
	foreach( $wp_scripts->queue as $handle ) :
         $obj = $wp_scripts->registered [$handle];
         echo $filename = $obj->src;
		 echo ' : <b>Handle for this script is:</b> <span style="color:green"> '.$handle.'</span><br/><br/>';
		 $id++;
	endforeach;
	}
	echo '<p style="color:red;font-weight:600;font-size:2em;">Nombre de scripts : '.$id.'</p>';
}
add_action( 'wp_print_scripts', 'display_script_handles' );

Then, I load the homepage in order for me to see these handles.
However, I can see that wp_print_scripts runs twice.

Is that an issue ? Does it mean that each script is loaded twice ?

Besides, each time it runs, it displays a different number of scripts. Maybe there’s a reason for it ?

Thank you for your help.