Product should be assigned to option while option is assigned to product.

Author: p-bystritsky

app/code/Magento/Customer/Model/Plugin/CustomerAuthorization.php

@@ -8,6 +8,7 @@
 
 use Magento\Authorization\Model\UserContextInterface;
 use Magento\Customer\Model\CustomerFactory;
+use Magento\Customer\Model\ResourceModel\Customer as CustomerResource;
 use Magento\Integration\Api\AuthorizationServiceInterface as AuthorizationService;
 use Magento\Store\Model\StoreManagerInterface;
 
@@ -24,29 +25,37 @@ class CustomerAuthorization
     private $userContext;
 
     /**
-     * @var StoreManagerInterface
+     * @var CustomerFactory
      */
-    private $storeManager;
+    private $customerFactory;
 
     /**
-     * @var CustomerFactory
+     * @var CustomerResource
      */
-    private $customerFactory;
+    private $customerResource;
+
+    /**
+     * @var StoreManagerInterface
+     */
+    private $storeManager;
 
     /**
      * Inject dependencies.
      *
      * @param UserContextInterface $userContext
      * @param CustomerFactory $customerFactory
+     * @param CustomerResource $customerResource
      * @param StoreManagerInterface $storeManager
      */
     public function __construct(
         UserContextInterface $userContext,
         CustomerFactory $customerFactory,
+        CustomerResource $customerResource,
         StoreManagerInterface $storeManager
     ) {
         $this->userContext = $userContext;
         $this->customerFactory = $customerFactory;
+        $this->customerResource = $customerResource;
         $this->storeManager = $storeManager;
     }
 
@@ -72,7 +81,8 @@ public function aroundIsAllowed(
             && $this->userContext->getUserId()
             && $this->userContext->getUserType() === UserContextInterface::USER_TYPE_CUSTOMER
         ) {
-            $customer = $this->customerFactory->create()->load($this->userContext->getUserId());
+            $customer = $this->customerFactory->create();
+            $this->customerResource->load($customer, $this->userContext->getUserId());
             $currentStoreId = $this->storeManager->getStore()->getId();
             $sharedStoreIds = $customer->getSharedStoreIds();
             if (in_array($currentStoreId, $sharedStoreIds)) {

dev/tests/api-functional/testsuite/Magento/Customer/Api/CustomerSharingOptionsTest.php

@@ -60,7 +60,7 @@ class CustomerSharingOptionsTest extends WebapiAbstract
     /**
      * Execute per test initialization.
      */
-    public function setUp()
+    public function setUp(): void
     {
         $this->customerRegistry = Bootstrap::getObjectManager()->get(
             \Magento\Customer\Model\CustomerRegistry::class
@@ -82,7 +82,7 @@ public function setUp()
     /**
      * Ensure that fixture customer and his addresses are deleted.
      */
-    public function tearDown()
+    public function tearDown(): void
     {
         $this->customerRepository = null;