Bootstrap Nav-tabs fail for iPhone

I'm using Bootstrap with an Ember project, and following markup produces navigation tabs that work on the desktop, but fail in Chrome & Safari the iPhone 6.

Here is the markup produced:

<nav>
  <ul class="nav nav-tabs">
    <li id="ember611" class="ember-view active">  
      <a>Tab 1</a>
    </li>
    <li id="ember612" class="ember-view">     
      <a>Tab 2</a>
    </li>
  </ul>
</nav>

Tapping on Tab 2 doesn't work. Any suggestions?

I'm using Bootstrap 3.3.4, and Ember 1.3