Tabs in angularjs not working properly with UI-Router and UI-bootstrap

I'm using a MEAN.js boilerplate, you can find the entire code here.

I tried to add 2 new tabs to the page rendered after one of the articles have been selected from the list. For this task I decided to use both the UI-Router and UI-Bootstrap for Angular.js. The 2 tabs doesn't works properly, I can switch between them and correctly see their content, but occasionally when I go back and select the article list menu item, I get a blank page with the 2 tabs and nothing else.

Here is the changes to the view-article.client.view.html file to include 2 new tabs (the previous content has been copied to the 2 files containing the partial for the new tabs ):

 <div ng-controller="ArticlesController">
   <tabset>
     <tab
            ng-repeat="t in tabs"
            heading="{{t.heading}}"
            select="go(t.route)"
            active="t.active">
     </tab>
   </tabset>
  <div ui-view></div>
 </div>

I've inserted to the article controller these few lines of code:

$scope.tabs = [
       { heading: 'SubA', route:'viewArticle.SubA', active:false },
       { heading: 'SubB', route:'viewArticle.SubB', active:false }

   ];

   $scope.go = function(route){
       $state.go(route);
   };

   $scope.active = function(route){
       return $state.is(route);
   };

   $scope.$on('$stateChangeSuccess', function() {
       $scope.tabs.forEach(function(tab) {
           tab.active = $scope.active(tab.route);
       });
   });

Here's the route.js

'use strict'
angular.module('articles').config(['$stateProvider',
   function($stateProvider) {
    $stateProvider.
    state('listArticles', {
        url: '/articles',
        templateUrl: 'modules/articles/views/list-articles.client.view.html'
    }).
    state('createArticle', {
        url: '/articles/create',
        templateUrl: 'modules/articles/views/create-article.client.view.html'
    }).
    state('viewArticle', {
        url: '/articles/:articleId',
        templateUrl: 'modules/articles/views/view-article.client.view.html'
    }).
    state('editArticle', {
        url: '/articles/:articleId/edit',
        templateUrl: 'modules/articles/views/edit-article.client.view.html'
    }).
    state('viewArticle.SubA', {
        url: '/SubA',
        templateUrl: 'modules/articles/views/view-article.client.view.SubA.html'
    }).

    state('viewArticle.SubB', {
        url: '/SubB',
        templateUrl: 'modules/articles/views/view-article.client.view.SubB.html'
    });
   }
]);