Elementor – Why is both mobile and desktop nav menu showing on WordPress site?

Working on a WP site (site link) with Elementor Pro, my problem is that while editing the page and the site, the header looks fine, but on the live site both the mobile and desktop nav menu is showing at the same time.

I’m using an Elementor kit from Envato (link)

I had to edit some WP theme .php files to edit the nav menu, but upon restoring the original file nothing changed.

This is the code I added to the theme file (wp-content/themes/twentytwentytwo/functions.php) and it allowed me to edit the nav menus:

add_theme_support('menus');
function register_my_menus() {
$args = array( 
    'menu-1' => __( 'Main Menu' )
);
register_nav_menus( $args );
}
add_action( 'init', 'register_my_menus' );