diff --git a/app/assets/javascripts/discourse/components/topic-progress.js.es6 b/app/assets/javascripts/discourse/components/topic-progress.js.es6
index 51b6aeb54f6..6e0315e319c 100644
--- a/app/assets/javascripts/discourse/components/topic-progress.js.es6
+++ b/app/assets/javascripts/discourse/components/topic-progress.js.es6
@@ -20,6 +20,13 @@ export default Ember.Component.extend({
     return !userWantsToJump && showTimeline;
   },
 
+  @observes('hidden')
+  visibilityChanged() {
+    if (!this.get('hidden')) {
+      this._updateBar();
+    }
+  },
+
   keyboardTrigger(kbdEvent) {
     if (kbdEvent.type === 'jump') {
       this.set('expanded', true);
@@ -46,7 +53,6 @@ export default Ember.Component.extend({
     return progressPosition >= filteredPostsCount || progressPosition >= highestPostNumber;
   },
 
-
   @computed('postStream.loaded', 'topic.currentPost', 'postStream.filteredPostsCount')
   hideProgress(loaded, currentPost, filteredPostsCount) {
     return (!loaded) || (!currentPost) || (filteredPostsCount < 2);