diff --git a/includes/Admin.php b/includes/Admin.php
index f8f4d963a..2005c67bf 100644
--- a/includes/Admin.php
+++ b/includes/Admin.php
@@ -1610,7 +1610,7 @@ public function save_product_variation_edit_fields( $variation_id, $index ) {
 		}
 
 		// ALWAYS save Facebook field data (this fixes the PR #2931 breaking change)
-		$posted_param    = 'variable_' . \WC_Facebookcommerce_Integration::FB_PRODUCT_DESCRIPTION;
+		$posted_param = 'variable_' . \WC_Facebookcommerce_Integration::FB_PRODUCT_DESCRIPTION;
 		// phpcs:ignore WordPress.Security.ValidatedSanitizedInput.InputNotSanitized -- Intentionally getting raw value to apply different sanitization methods below
 		$description_raw = isset( $_POST[ $posted_param ][ $index ] ) ? wp_unslash( $_POST[ $posted_param ][ $index ] ) : null;
 
diff --git a/includes/Checkout.php b/includes/Checkout.php
index 4c940b2a5..749cc556b 100644
--- a/includes/Checkout.php
+++ b/includes/Checkout.php
@@ -147,7 +147,27 @@ public function load_checkout_permalink_template( $template ) {
 
 			$coupon_code = get_query_var( 'coupon' );
 			if ( $coupon_code ) {
-				WC()->cart->apply_coupon( sanitize_text_field( $coupon_code ) );
+				$coupon_code_sanitized = sanitize_text_field( $coupon_code );
+				WC()->cart->apply_coupon( $coupon_code_sanitized );
+
+				if ( ! in_array( $coupon_code_sanitized, WC()->cart->get_applied_coupons(), true ) ) {
+					$error_message = sprintf(
+						'Failed to apply coupon: %s',
+						$coupon_code_sanitized
+					);
+
+					\WC_Facebookcommerce_Utils::log_to_meta(
+						$error_message,
+						array(
+							'flow_name'  => 'checkout',
+							'flow_step'  => 'apply_coupon',
+							'extra_data' => [
+								'coupon_param' => $coupon_code,
+								'coupon_code'  => $coupon_code_sanitized,
+							],
+						)
+					);
+				}
 			}
 
 			$checkout_url = wc_get_checkout_url();