Issue #2949412: Nested paragraphs automatically publish, even if the parent is a draft

src/Entity/Paragraph.php

@@ -124,8 +124,21 @@ class Paragraph extends ContentEntityBase implements ParagraphInterface {
     if (!isset($this->get('parent_type')->value) || !isset($this->get('parent_id')->value)) {
       return NULL;
     }
-
-    $parent = \Drupal::entityTypeManager()->getStorage($this->get('parent_type')->value)->load($this->get('parent_id')->value);
+    $parentFieldName = $this->parent_field_name->value;
+
+    // Look up the paragraph's parent by the revision.
+    $entity_type_manager = \Drupal::entityTypeManager();
+    $target_entity_storage = $entity_type_manager->getStorage($this->get('parent_type')->value);
+
+    // Query parent entity type revisions that contain the paragraph at it's
+    // given version id.
+    $revision_ids = $target_entity_storage
+      ->getQuery()
+      ->allRevisions()
+      ->condition($parentFieldName . '.target_revision_id', $this->getLoadedRevisionId())
+      ->condition($parentFieldName . '.target_id', $this->id())
+      ->execute();
+    $parent = \Drupal::entityTypeManager()->getStorage($this->get('parent_type')->value)->loadRevision(array_key_first($revision_ids));
 
     // Return current translation of parent entity, if it exists.
     if ($parent != NULL && ($parent instanceof TranslatableInterface) && $parent->hasTranslation($this->language()->getId())) {