Do not handle jobs which were submitted not through plugins which extend...

Do not handle jobs which were submitted not through plugins which extend ExtendedTranslatorPluginInterface interface

tmgmt_smartling.module

@@ -863,7 +863,11 @@ function tmgmt_smartling_tmgmt_extension_suit_updated_entity_jobs(array $job_ids
 
   $translator_plugin = $translator->getPlugin();
 
-  if (empty($translator_plugin) || $translator_plugin->getPluginId() !== 'smartling') {
+  if (
+    empty($translator_plugin) ||
+    !$translator_plugin instanceof ExtendedTranslatorPluginInterface ||
+    $translator_plugin->getPluginId() !== 'smartling'
+  ) {
     return [];
   }