title: ReactNative: Deep Linking in react-native-router-flux does not work fine
body: <p>I set up deep linking in iOS using react-native-router-flux.
  And I encountered the issue in this comment of mine.</p>
  
  <p><a href="https://github.com/aksonov/react-native-router-flux/issues/3083#issuecomment-398651643" rel="nofollow noreferrer">https://github.com/aksonov/react-native-router-flux/issues/3083#issuecomment-398651643</a></p>
  
  <p>It works when the app is shut down, but does not when the app is running in background, only to re-open the app.</p>
  
  <p>How can I fix this?</p>