ENGCOM-5530: Resolve Customer sent newsletter unsubscribe email when registering for a new account and newsletter confirmation is on (issue 23729) #23737

 - Merge Pull Request #23737 from edenduong/magento2:2.3-bugfix/issue23729
 - Merged commits:
   1. 8604be9
   2. fc1687b
   3. f25dfd3

Author: magento-engcom-team

app/code/Magento/Customer/Controller/Account/CreatePost.php

@@ -3,6 +3,8 @@
  * Copyright © Magento, Inc. All rights reserved.
  * See COPYING.txt for license details.
  */
+declare(strict_types=1);
+
 namespace Magento\Customer\Controller\Account;
 
 use Magento\Customer\Api\CustomerRepositoryInterface as CustomerRepository;
@@ -349,15 +351,14 @@ public function execute()
             $confirmation = $this->getRequest()->getParam('password_confirmation');
             $redirectUrl = $this->session->getBeforeAuthUrl();
             $this->checkPasswordConfirmation($password, $confirmation);
+
+            $extensionAttributes = $customer->getExtensionAttributes();
+            $extensionAttributes->setIsSubscribed($this->getRequest()->getParam('is_subscribed', false));
+            $customer->setExtensionAttributes($extensionAttributes);
+
             $customer = $this->accountManagement
                 ->createAccount($customer, $password, $redirectUrl);
 
-            if ($this->getRequest()->getParam('is_subscribed', false)) {
-                $extensionAttributes = $customer->getExtensionAttributes();
-                $extensionAttributes->setIsSubscribed(true);
-                $customer->setExtensionAttributes($extensionAttributes);
-                $this->customerRepository->save($customer);
-            }
             $this->_eventManager->dispatch(
                 'customer_register_success',
                 ['account_controller' => $this, 'customer' => $customer]