beta14: sidebar broken when using with tabs

Hi,

I am new to ionic so apology if this issue has been raised already.

I am looking at following codepen example. I have noticed version 14 has broken this sample. However, this sample is working in beta version 13. Can you please advise either something has changed in beta14 which needs fixing in this working example or is it a bug? Thanks

Codepen

Broken

<link href="http://code.ionicframework.com/1.0.0-beta.14/css/ionic.min.css" rel="stylesheet">
<script src="http://code.ionicframework.com/1.0.0-beta.14/js/ionic.bundle.min.js"></script>

Working

<link href="http://code.ionicframework.com/1.0.0-beta.13/css/ionic.min.css" rel="stylesheet">
<script src="http://code.ionicframework.com/1.0.0-beta.13/js/ionic.bundle.min.js"></script>

The buttons need to be inside of the nav-bar. Changing the ion-nav-bar to this fixes it:

<ion-nav-bar class="bar-positive">
    <ion-nav-back-button></ion-nav-back-button>

    <ion-nav-buttons side="left">
      <button class="button button-icon button-clear ion-navicon" ng-click="showMenu()">
      </button>
    </ion-nav-buttons>
     <ion-nav-buttons side="right">
      <button class="button button-icon button-clear ion-ios7-gear" ng-click="showRightMenu()">
      </button>
    </ion-nav-buttons>
</ion-nav-bar>