title: Profile.getCurrentProfile() returns null after logging in (FB API v4.0)
body: <p>For some reason <code>Profile.getCurrentProfile()</code> shows up null at times right after logging into FaceBook, using FB API v4.0.</p>
  
  <p>This is causing problems for me in my app because I can't display my next <code>Activity</code> with <code>Profile</code> being null.</p>
  
  <p>The reason I say it's null sometimes is because if I close out of my app and re-open it, I'm able to get to my next <code>Activity</code>, but if I'm not already logged in, and then login, <code>Profile</code> is null. It seems it is for a short period.</p>
  
  <p>Is there a work around or fix to this?</p>