title: Navigating back to FragmentPagerAdapter -> fragments are empty
body: <p>I have a Fragment (I'll call it <code>pagerFragment</code>) that is added to the backstack and is visible. It holds a <code>viewPager</code> with a <code>FragmentPagerAdapter</code>. The <code>FragmentPagerAdapter</code> holds (let's say) two fragments: A and B.</p>
  
  <p>First adding of the fragments works great.</p>
  
  <p>Fragment A has a button that once clicked, adds a fragment (C) to the backstack.</p>
  
  <p>The problem is this: if I add that fragment (C), and then click back, the <code>pagerAdapter</code> is empty, and I cannot see any fragments inside.</p>
  
  <p>If I use a hack, and destroy the children fragments (A and B) in the <code>pagerFragment</code>s <code>onDestroyView()</code>, this solves the problem, although I don't wan't to use this hack.</p>
  
  <p>Any ideas what the issue could be?</p>