diff -u b/tests/src/Kernel/Normalizer/LinkItemNormalizerTest.php b/tests/src/Kernel/Normalizer/LinkItemNormalizerTest.php
--- b/tests/src/Kernel/Normalizer/LinkItemNormalizerTest.php
+++ b/tests/src/Kernel/Normalizer/LinkItemNormalizerTest.php
@@ -195,17 +195,11 @@
         'uri' => 'entity:entity_test_mulrev/manage/' . $referenced_entity1->id(),
         'title' => NULL,
         'options' => [],
-        '_entity_uuid' => $referenced_entity1->uuid(),
-        '_entity_type' => $referenced_entity1->getEntityTypeId(),
-        $referenced_entity1->getEntityType()->getKey('bundle') => $referenced_entity1->bundle(),
       ],
       [
         'uri' => 'internal:/entity_test_mulrev/manage/' . $referenced_entity2->id(),
         'title' => NULL,
         'options' => [],
-        '_entity_uuid' => $referenced_entity2->uuid(),
-        '_entity_type' => $referenced_entity2->getEntityTypeId(),
-        $referenced_entity2->getEntityType()->getKey('bundle') => $referenced_entity2->bundle(),
       ],
     ];
     foreach ($denormalized->get('field_test_link')->getValue() as $key => $item) {
only in patch2:
unchanged:
--- a/src/Normalizer/LinkItemNormalizer.php
+++ b/src/Normalizer/LinkItemNormalizer.php
@@ -154,6 +154,13 @@ class LinkItemNormalizer extends FieldItemNormalizer {
       }
       if ($entity instanceof EntityInterface) {
         $data['uri'] = str_replace($entity_uuid, $entity->id(), $data['uri']);
+        unset($data['_entity_uuid']);
+        unset($data['_entity_type']);
+        $bundle_key = $entity->getEntityType()->getKey('bundle');
+        $bundle = $entity->bundle();
+        if ($bundle_key && $bundle) {
+          unset($data[$bundle_key]);
+        }
       }
     }