title: Swift 3: unexpected call of applicationDidBecomeBackground after start
body: <p>Im facing a problem with Xcode after switching from Swift 2 to Swift 3 when I compile my app. When I call the Simulator it starts and right after the init screen appears, I get the message "applicationDidBecomeBackground" without any other information. 
  I am using Xcode 8.3.3 and LaunchScreen.xib. To be honest I am a bit lost why this happens after changing from swift 2 to 3. 
  Any help is much appreciated.</p>
  
  <p><a href="https://i.stack.imgur.com/4Q5QU.jpg" rel="nofollow noreferrer"><img src="https://i.stack.imgur.com/4Q5QU.jpg" alt="General Part "></a></p>
  
  <p><a href="https://i.stack.imgur.com/x7CP8.jpg" rel="nofollow noreferrer"><img src="https://i.stack.imgur.com/x7CP8.jpg" alt="This is the message I&#39;ve got"></a></p>