Add Integration Test to cover consecutive calls.

Author: lbajsarowicz

dev/tests/integration/testsuite/Magento/Backend/Controller/Adminhtml/ConsecutiveCallTest.php

@@ -0,0 +1,25 @@
+<?php
+/**
+ * Copyright © Magento, Inc. All rights reserved.
+ * See COPYING.txt for license details.
+ */
+declare(strict_types=1);
+
+namespace Magento\Backend\Controller\Adminhtml;
+
+use Magento\TestFramework\TestCase\AbstractBackendController;
+
+/**
+ * @magentoAppArea adminhtml
+ */
+class ConsecutiveCallTest extends AbstractBackendController
+{
+    /**
+     * Consecutive calls were failing due to `$request['dispatched']` not being reset before request
+     */
+    public function testConsecutiveCallShouldNotFail()
+    {
+        $this->dispatch('backend/admin/auth/login');
+        $this->dispatch('backend/admin/auth/login');
+    }
+}