diff --git a/src/state/selectors/manifests.js b/src/state/selectors/manifests.js
index e0ea6054e..8c99dc926 100644
--- a/src/state/selectors/manifests.js
+++ b/src/state/selectors/manifests.js
@@ -10,6 +10,7 @@ import { getConfig } from './config';
 /** */
 function createManifestoInstance(json, locale) {
   if (!json) return undefined;
+  // Use JSON stringify/parse to create a deep copy and prevent Manifesto from mutating the json
   const manifestoObject = Utils.parseManifest(JSON.parse(JSON.stringify(json)), locale ? { locale } : undefined);
   // Local patching of Manifesto so that when its a Collection, it behaves similarly
   if (typeof manifestoObject.getSequences != 'function') {