ENGCOM-5188: [Backport] #22869 - defaulting customer storeId fix #22895

Author: p-bystritsky

app/code/Magento/Customer/Model/ResourceModel/CustomerRepository.php

@@ -214,7 +214,9 @@ public function save(\Magento\Customer\Api\Data\CustomerInterface $customer, $pa
 
         $storeId = $customerModel->getStoreId();
         if ($storeId === null) {
-            $customerModel->setStoreId($this->storeManager->getStore()->getId());
+            $customerModel->setStoreId(
+                $prevCustomerData ? $prevCustomerData->getStoreId() : $this->storeManager->getStore()->getId()
+            );
         }
 
         $this->populateCustomerWithSecureData($customerModel, $passwordHash);