diff --git a/includes/paynow-payment/includes/gateways/class-paynow-payment-response.php b/includes/paynow-payment/includes/gateways/class-paynow-payment-response.php
index e81277b8..6318f04e 100755
--- a/includes/paynow-payment/includes/gateways/class-paynow-payment-response.php
+++ b/includes/paynow-payment/includes/gateways/class-paynow-payment-response.php
@@ -203,7 +203,9 @@ public static function paynow_valid_offline_response( $posted ) {
 
 			$order->update_meta_data( '_paynow_tran_id', $buysafe_no );
 			$order->update_meta_data( '_paynow_tran_status', $tran_status );
-			$order->update_meta_data( '_transaction_id', $buysafe_no );
+			// HPOS 下 `_transaction_id` 是 wc_orders.transaction_id 欄位，
+			// 透過 update_meta_data 寫入會被靜默丟棄，必須使用 setter。
+			$order->set_transaction_id( $buysafe_no );
 
 			// 虛擬帳號 virtual account pay type = 03.
 			if ( PayNow_Pay_Type::VIRTUAL_ACCOUNT === $pay_type ) {
diff --git a/includes/ry-woocommerce-tools/woocommerce/shipping/ry-base.php b/includes/ry-woocommerce-tools/woocommerce/shipping/ry-base.php
index 011a66b2..670ff434 100644
--- a/includes/ry-woocommerce-tools/woocommerce/shipping/ry-base.php
+++ b/includes/ry-woocommerce-tools/woocommerce/shipping/ry-base.php
@@ -178,7 +178,9 @@ public static function save_order_update( $order_id ) {
 
 							// HPOS 相容：使用物件方法操作 meta
 							$shipping_address = $order->get_address( 'shipping' );
-							$order->update_meta_data( '_shipping_address_1', wc_clean( wp_unslash( $_POST['_shipping_cvs_store_address'] ) ) );
+							// `_shipping_address_1` 是 wc_order_addresses 的核心欄位，
+							// HPOS 下 update_meta_data 會被靜默丟棄，必須用 setter。
+							$order->set_shipping_address_1( wc_clean( wp_unslash( $_POST['_shipping_cvs_store_address'] ) ) );
 							$order->update_meta_data( '_shipping_address_index', implode( ' ', $shipping_address ) );
 							$order->save();
 						}