Issue #3183592 : Get translation node before showing transitions.

Closes #3183592

src/Form/Entity/ScheduledTransitionAddForm.php

@@ -177,6 +177,11 @@ class ScheduledTransitionAddForm extends ContentEntityForm {
     if (is_numeric($revision) && $revision > 0) {
       $entityStorage = $this->entityTypeManager->getStorage($entity->getEntityTypeId());
       $entityRevision = $entityStorage->loadRevision($revision);
+      // When the entity is translatable, load the translation for the current
+      // language.
+      if ($entityRevision instanceof TranslatableInterface && $entityRevision->isTranslatable()) {
+        $entityRevision = $entityRevision->getTranslation($this->languageManager->getCurrentLanguage(LanguageInterface::TYPE_CONTENT)->getId());
+      }
       $toTransitions = $this->stateTransitionValidation
         ->getValidTransitions($entityRevision, $this->currentUser());
     }