[-] BO: Fix #PSCFV-8179 shop domain used in emails sometimes was for the wrong shop

controllers/admin/AdminCustomerThreadsController.php

@@ -373,6 +373,9 @@ class AdminCustomerThreadsControllerCore extends AdminController
 			if (Tools::isSubmit('submitReply'))
 			{
 				$ct = new CustomerThread($id_customer_thread);
+
+				ShopUrl::cacheMainDomainForShop((int)$ct->id_shop);
+
 				$cm = new CustomerMessage();
 				$cm->id_employee = (int)$this->context->employee->id;
 				$cm->id_customer_thread = $ct->id;