diff --git a/core/modules/path/src/Plugin/Field/FieldType/PathItem.php b/core/modules/path/src/Plugin/Field/FieldType/PathItem.php
index 9cc570c..ea21dac 100644
--- a/core/modules/path/src/Plugin/Field/FieldType/PathItem.php
+++ b/core/modules/path/src/Plugin/Field/FieldType/PathItem.php
@@ -46,6 +46,13 @@ public static function schema(FieldStorageDefinitionInterface $field_definition)
   /**
    * {@inheritdoc}
    */
+  public function isEmpty() {
+    return ($this->alias === NULL || $this->alias === '') && ($this->pid === NULL || $this->pid === '');
+  }
+
+  /**
+   * {@inheritdoc}
+   */
   public function preSave() {
     $this->alias = trim($this->alias);
   }
diff --git a/core/modules/serialization/src/Normalizer/ContentEntityNormalizer.php b/core/modules/serialization/src/Normalizer/ContentEntityNormalizer.php
index d3abef6..ad3f02e 100644
--- a/core/modules/serialization/src/Normalizer/ContentEntityNormalizer.php
+++ b/core/modules/serialization/src/Normalizer/ContentEntityNormalizer.php
@@ -22,6 +22,7 @@ public function normalize($entity, $format = NULL, array $context = []) {
 
     $attributes = [];
     foreach ($entity as $name => $field_items) {
+      $field_items->filterEmptyItems();
       if ($field_items->access('view', $context['account'])) {
         $attributes[$name] = $this->serializer->normalize($field_items, $format, $context);
       }