WooCommerce Subscriptions - Incorrect Price Filtering on Upgrade/Downgrade

Overview of the issue

In WooCommerce Subscriptions, when updating a subscription (whether it’s an upgrade, downgrade, or crossgrade), the price isn’t filtered correctly. This results in incorrect pricing during the change of subscription plans.

Workaround

Please, make sure of having a full backup of your site before proceeding.

• Open …/wp-content/plugins/woocommerce-multilingual/compatibility/WcSubscriptions/MulticurrencyHooks.php file.
• Look for line 253.
• Change:

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  public function woocommerce_subscription_price_from( $price, $product ) {     if ( $product instanceof WC_Product_Subscription_Variation ) {         $customPricesOn = get_post_meta( $product->get_id(), '_wcml_custom_prices_status', true );           if ( $customPricesOn ) {             $price = get_post_meta( $product->get_id(), '_price_' . $this->woocommerce_wpml->multi_currency->get_client_currency(), true );         } else {             $price = apply_filters( 'wcml_raw_price_amount', $price );         }     }       return $price; }

• For:

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  public function woocommerce_subscription_price_from( $price, $product ) {     if ( $product instanceof WC_Product_Subscription_Variation || $product instanceof \WC_Product_Subscription) {         $customPricesOn = get_post_meta( $product->get_id(), '_wcml_custom_prices_status', true );           if ( $customPricesOn ) {             $price = get_post_meta( $product->get_id(), '_price_' . $this->woocommerce_wpml->multi_currency->get_client_currency(), true );         } else {             $id = $product->get_id();             $type = get_post_type($id);             $trid = apply_filters( 'wpml_element_trid', NULL, $id,  'post_'.$type );             $translations = apply_filters( 'wpml_get_element_translations', NULL, $trid , 'post_'.$type );             foreach ($translations as $translation){                 if ($translation->original == 1){                     if ( get_post_meta( $translation->element_id, '_wcml_custom_prices_status', true ) ) {                         $price = get_post_meta( $translation->element_id, '_price_' . $this->woocommerce_wpml->multi_currency->get_client_currency(), true );                     } else {                         $price = apply_filters( 'wcml_raw_price_amount', $price );                     }                 }             }         }     }       return (int)$price; }