diff --git docroot/modules/contrib/tmgmt/sources/content/src/Plugin/tmgmt/Source/ContentEntitySource.php docroot/modules/contrib/tmgmt/sources/content/src/Plugin/tmgmt/Source/ContentEntitySource.php
index 45d8763612..f8624f45c2 100644
--- docroot/modules/contrib/tmgmt/sources/content/src/Plugin/tmgmt/Source/ContentEntitySource.php
+++ docroot/modules/contrib/tmgmt/sources/content/src/Plugin/tmgmt/Source/ContentEntitySource.php
@@ -225,7 +225,7 @@ public function getData(JobItemInterface $job_item) {
    * @return array $data
    *   Translatable data.
    */
-  public function extractTranslatableData(ContentEntityInterface $entity) {
+  public function extractTranslatableData(ContentEntityInterface $entity, &$entityRegistry = []) {
     $field_definitions = $entity->getFieldDefinitions();
     $exclude_field_types = ['language'];
     $exclude_field_names = ['moderation_state'];
@@ -301,7 +301,13 @@ public function extractTranslatableData(ContentEntityInterface $entity) {
             if ($content_translation_manager->isEnabled($referenced_entity->getEntityTypeId(), $referenced_entity->bundle()) && $referenced_entity->hasTranslation($langcode)) {
               $referenced_entity = $referenced_entity->getTranslation($langcode);
             }
-            $data[$field_name][$delta][$property_key] = $this->extractTranslatableData($referenced_entity);
+
+            // Prevent recursion.
+            $ref_code = $referenced_entity->getEntityType()->getLabel() . ':' . $referenced_entity->id();
+            if (!isset($entityRegistry[$ref_code])) {
+              $entityRegistry[$ref_code] = 1;
+              $data[$field_name][$delta][$property_key] = $this->extractTranslatableData($referenced_entity, $entityRegistry);
+            }
             // Use the ID of the entity to identify it later, do not rely on the
             // UUID as content entities are not required to have one.
             $data[$field_name][$delta][$property_key]['#id'] = $property->getValue()->id();