title: White Screen between fragment transactions
body: <p>Everything is working fine with following code.</p>
  
  <pre><code>fragmentManager =   NavigationDrawerActivity.this.getSupportFragmentManager();
          ft              =   fragmentManager.beginTransaction();
          ft.replace(R.id.sample_content_fragment, fragment, fragment_tag);
          ft.commit();
  </code></pre>
  
  <p>When I add the following line:-</p>
  
  <pre><code>ft.addToBackStack(fragment_tag);
  </code></pre>
  
  <p>as the second last line, it shows up a white screen when I click back between the fragments.</p>