use getOriginal() no bc (test only, do not commit)

src/Entity/FieldEncryptEntityType.php

@@ -117,7 +117,7 @@ class FieldEncryptEntityType extends ConfigEntityBase {
    */
   public function postSave(EntityStorageInterface $storage, $update = TRUE): void {
     parent::postSave($storage, $update);
-    if (!$update || $this->getBaseFields() !== $this->original->getBaseFields()) {
+    if (!$update || $this->getBaseFields() !== $this->getOriginal()->getBaseFields()) {
       self::queueEntityUpdates($this->id());
     }
     // Update the field_encrypt module's state.