diff --git a/lib/Doctrine/ORM/UnitOfWork.php b/lib/Doctrine/ORM/UnitOfWork.php
index a66d7b462..7044ce57e 100644
--- a/lib/Doctrine/ORM/UnitOfWork.php
+++ b/lib/Doctrine/ORM/UnitOfWork.php
@@ -2390,17 +2390,8 @@ class UnitOfWork implements PropertyChangedListener
             $this->visitedCollections =
             $this->orphanRemovals = array();
         } else {
-            $visited = array();
-
-            foreach ($this->identityMap as $className => $entities) {
-                if ($className !== $entityName) {
-                    continue;
-                }
-
-                foreach ($entities as $entity) {
-                    $this->doDetach($entity, $visited, false);
-                }
-            }
+            $this->clearIdentityMapForEntityName($entityName);
+            $this->clearEntityInsertionsForEntityName($entityName);
         }
 
         if ($this->evm->hasListeners(Events::onClear)) {
@@ -3463,4 +3454,33 @@ class UnitOfWork implements PropertyChangedListener
     {
         $this->hydrationCompleteHandler->hydrationComplete();
     }
+
+    /**
+     * @param string $entityName
+     */
+    private function clearIdentityMapForEntityName($entityName)
+    {
+        if (! isset($this->identityMap[$entityName])) {
+            return;
+        }
+
+        $visited = [];
+
+        foreach ($this->identityMap[$entityName] as $entity) {
+            $this->doDetach($entity, $visited, false);
+        }
+    }
+
+    /**
+     * @param string $entityName
+     */
+    private function clearEntityInsertionsForEntityName($entityName)
+    {
+        foreach ($this->entityInsertions as $hash => $entity) {
+            // note: performance optimization - `instanceof` is much faster than a function call
+            if ($entity instanceof $entityName && get_class($entity) === $entityName) {
+                unset($this->entityInsertions[$hash]);
+            }
+        }
+    }
 }
diff --git a/tests/Doctrine/Tests/ORM/UnitOfWorkTest.php b/tests/Doctrine/Tests/ORM/UnitOfWorkTest.php
index eb8bf3a5c..8755a4eaa 100644
--- a/tests/Doctrine/Tests/ORM/UnitOfWorkTest.php
+++ b/tests/Doctrine/Tests/ORM/UnitOfWorkTest.php
@@ -15,6 +15,8 @@ use Doctrine\Tests\Mocks\UnitOfWorkMock;
 use Doctrine\Tests\Models\CMS\CmsPhonenumber;
 use Doctrine\Tests\Models\Forum\ForumAvatar;
 use Doctrine\Tests\Models\Forum\ForumUser;
+use Doctrine\Tests\Models\GeoNames\City;
+use Doctrine\Tests\Models\GeoNames\Country;
 use Doctrine\Tests\OrmTestCase;
 use stdClass;
 
@@ -323,6 +325,28 @@ class UnitOfWorkTest extends OrmTestCase
         $this->assertTrue($this->_unitOfWork->isInIdentityMap($entity));
     }
 
+    /**
+     * @group 5849
+     * @group 5850
+     */
+    public function testPersistedEntityAndClearManager()
+    {
+        $entity1 = new City(123, 'London');
+        $entity2 = new Country(456, 'United Kingdom');
+
+        $this->_unitOfWork->persist($entity1);
+        $this->assertTrue($this->_unitOfWork->isInIdentityMap($entity1));
+
+        $this->_unitOfWork->persist($entity2);
+        $this->assertTrue($this->_unitOfWork->isInIdentityMap($entity2));
+
+        $this->_unitOfWork->clear(Country::class);
+        $this->assertTrue($this->_unitOfWork->isInIdentityMap($entity1));
+        $this->assertFalse($this->_unitOfWork->isInIdentityMap($entity2));
+        $this->assertTrue($this->_unitOfWork->isScheduledForInsert($entity1));
+        $this->assertFalse($this->_unitOfWork->isScheduledForInsert($entity2));
+    }
+
     /**
      * Data Provider
      *