[5.x] Ensure field parent is set correctly (#13305)

Author: aerni

src/Http/Controllers/CP/Collections/ExtractsFromEntryFields.php

@@ -31,6 +31,7 @@ protected function extractFromFields($entry, $blueprint)
         }
 
         $fields = $blueprint
+            ->setParent($entry)
             ->fields()
             ->addValues($values)
             ->preProcess();