WooCommerce Ajax Cart Update click only fires on first click

I want to do an AJAX update (a hidden update cart button click) of my WooCommerce cart when user changes the quantity.
I followed the steps here.

So basically it’s this code:

jQuery(document).ready(function($) {
    let timeout;
    $('.woocommerce').on( 'change', 'input.qty', function(){
        if ( timeout !== undefined ) {
            clearTimeout( timeout );
        }
        timeout = setTimeout(function() {
            $("[name='update_cart']").trigger("click"); // trigger cart update
        }, 1000 ); // 1 second delay, half a second (500) seems comfortable too
    });
});

I’ve added the above script like so:

function custom_enqueue_cart_scripts() {
    error_log('custom_enqueue_cart_scripts');
    if (is_cart()) {
        error_log('is_cart()');
        wp_enqueue_script('custom-cart', get_stylesheet_directory_uri() . '/js/custom-cart.js', array('jquery'), null, true);           

    }
}
add_action('wp_enqueue_scripts', 'custom_enqueue_cart_scripts');

However, it only works when I change the quantity for the first time. Any subsequent click is not registered. Why?