Fix zen mode

client/coral-admin/src/routes/Moderation/components/ModerationQueue.js

@@ -397,6 +397,13 @@ class ModerationQueue extends React.Component {
       const index = comments.findIndex(
         comment => comment.id === selectedCommentId
       );
+
+      // This can happen temporarily when we call redux to change the selected comment
+      // but it didn't fully take effect yet.
+      if (index === -1) {
+        return null;
+      }
+
       const comment = comments[index];
       return (
         <div className={styles.root}>