diff --git a/app/components/SimpleEditor/panes/Comments/CommentsProvider.js b/app/components/SimpleEditor/panes/Comments/CommentsProvider.js
index ba9052201435b31312cb8deee1a5cc7cf3d8f279..d4d8af2b457a03d3940cf919446b6ff95ebfc0f8 100644
--- a/app/components/SimpleEditor/panes/Comments/CommentsProvider.js
+++ b/app/components/SimpleEditor/panes/Comments/CommentsProvider.js
@@ -395,7 +395,8 @@ class CommentsProvider extends TocProvider {
     comments = _.map(comments, function (comment) {
       const blockId = comment.path[0]
       let blockPosition = container.getPosition(blockId)
-      if (blockPosition === -1) blockPosition = containerMini.getPosition(blockId)
+      if (blockPosition === -1 && containerMini) blockPosition = containerMini.getPosition(blockId)
+
       const nodePosition = comment.start.offset
 
       return {