After today’s theme update, the ’email’ field is missing from the order summary.

Hello, hafunerix,

Thank you for your message. This information confirms that the issue is most likely related specifically to the guest checkout process.

For registered customers, WooCommerce retrieves the email address from the customer account. Guest orders, however, rely entirely on the billing_email value submitted during checkout. In this case, the email field is displayed and filled in, but its value appears to be removed or not saved during the guest checkout process.

As a temporary measure, please add the following code to the functions.php file of the XStore child theme:

/**
 * Force the billing email field to be required.
 */
add_filter(
	'woocommerce_checkout_fields',
	function ( $fields ) {

		if ( isset( $fields['billing']['billing_email'] ) ) {
			$fields['billing']['billing_email']['required'] = true;
			$fields['billing']['billing_email']['type']     = 'email';
		}

		return $fields;
	},
	9999
);

/**
 * Validate the email before WooCommerce creates the order.
 */
add_action(
	'woocommerce_after_checkout_validation',
	function ( $data, $errors ) {

		$email = '';

		if ( ! empty( $data['billing_email'] ) ) {
			$email = sanitize_email( $data['billing_email'] );
		} elseif ( ! empty( $_POST['billing_email'] ) ) {
			$email = sanitize_email(
				wp_unslash( $_POST['billing_email'] )
			);
		}

		/*
		 * Registered customers may have an email in their account,
		 * but guest checkout must always submit billing_email.
		 */
		if ( ! is_user_logged_in() && empty( $email ) ) {
			$errors->add(
				'guest_billing_email_missing',
				__(
					'Please enter your email address before placing the order.',
					'xstore-child'
				)
			);

			wc_get_logger()->warning(
				'Guest checkout was blocked because billing_email was missing.',
				array(
					'source'         => 'guest-checkout-email',
					'payment_method' => ! empty( $data['payment_method'] )
						? sanitize_text_field( $data['payment_method'] )
						: 'unknown',
				)
			);

			return;
		}

		if ( ! empty( $email ) && ! is_email( $email ) ) {
			$errors->add(
				'guest_billing_email_invalid',
				__(
					'Please enter a valid email address.',
					'xstore-child'
				)
			);
		}
	},
	9999,
	2
);

/**
 * Restore the submitted email before the order is saved.
 */
add_action(
	'woocommerce_checkout_create_order',
	function ( $order, $data ) {

		if ( ! $order instanceof WC_Order ) {
			return;
		}

		if ( $order->get_billing_email() ) {
			return;
		}

		$email = '';

		if ( ! empty( $data['billing_email'] ) ) {
			$email = sanitize_email( $data['billing_email'] );
		} elseif ( ! empty( $_POST['billing_email'] ) ) {
			$email = sanitize_email(
				wp_unslash( $_POST['billing_email'] )
			);
		}

		if ( is_email( $email ) ) {
			$order->set_billing_email( $email );

			wc_get_logger()->notice(
				'The missing billing email was restored during order creation.',
				array(
					'source' => 'guest-checkout-email',
				)
			);
		}
	},
	9999,
	2
);

After adding the code, please clear all website, server, CDN, and browser caches, and then place another test order as a guest.

This code will prevent a guest order from being created if WooCommerce does not receive an email address. It will also restore the address if it was submitted correctly but removed from the order object before saving.

Best regards,
8Theme Team