Cant add to cart on Shop page when adding variable product more than 1 quantity

hello @ngrudev
please test this with storefront theme and confirm if the issue persists

I confirm there is the same issue with the Storefront theme.

I forgot to mention that I use custom code to show quantity box on the shop page.

/**
 * Add quantity field on the archive page.
 */
function custom_quantity_field_archive() {

	$product = wc_get_product( get_the_ID() );

	//if ( ! $product->is_sold_individually() && 'variable' != $product->product_type && $product->is_purchasable() ) { //niki. ako ne go iskash za variable products. az go iskam
	if ( ! $product->is_sold_individually() && $product->is_purchasable() ) {
		woocommerce_quantity_input( array( 'min_value' => 1, 'max_value' => $product->backorders_allowed() ? '' : $product->get_stock_quantity() ) );
	}

}

add_action( 'woocommerce_after_shop_loop_item', 'custom_quantity_field_archive', 8, 9 );

function custom_add_to_cart_quantity_handler() {
    if (function_exists('is_woocommerce')) {
	wc_enqueue_js( '
	jQuery( "body" ).on( "click", ".quantity input", function() {
		return false;
	});
	jQuery( "body" ).on( "change input", ".quantity .qty", function() {
		var add_to_cart_button = jQuery( this ).parents( ".product" ).find( ".add_to_cart_button" );
		// For AJAX add-to-cart actions
		add_to_cart_button.attr( "data-quantity", jQuery( this ).val() );
		// For non-AJAX add-to-cart actions
		add_to_cart_button.attr( "href", "?add-to-cart=" + add_to_cart_button.attr( "data-product_id" ) + "&quantity=" + jQuery( this ).val() );
	});
	' );
    }
}
add_action( 'init', 'custom_add_to_cart_quantity_handler' );

Issue is resolved. The problem is in my custome code. I should remove or comment the line with code

//add_to_cart_button.attr( “href”, “?add-to-cart=” + add_to_cart_button.attr( “data-product_id” ) + “&quantity=” + jQuery( this ).val() );

In my case I use ajax and this piece of code should be removed/commented.