Trigger sync after updating meta

includes/data-stores/class-wc-product-variable-data-store-cpt.php

@@ -554,6 +554,7 @@ class WC_Product_Variable_Data_Store_CPT extends WC_Product_Data_Store_CPT imple
 				$managed_children = array_unique( $wpdb->get_col( $wpdb->prepare( "SELECT post_id FROM $wpdb->postmeta WHERE meta_key = '_manage_stock' AND meta_value != 'yes' AND post_id IN {$query_in}", $children ) ) ); // @codingStandardsIgnoreLine.
 				foreach ( $managed_children as $managed_child ) {
 					if ( update_post_meta( $managed_child, '_stock_status', $status ) ) {
+						$this->update_lookup_table( $managed_child, 'wc_product_meta_lookup' );
 						$changed = true;
 					}
 				}