title: How to properly handle a navigation stack with React Native tvOS / Android TV
body: <p>I am using react-native-tvos to build a tvOS and Amazon FireStick app. However I am running into a problem with react-navigation. Screens that are added to the navigation stack are still active in the background. This causes the focus engine to get confused. Using the directional pad on the remote the focus will shift between the non-visible screen on the bottom of the stack and the currently displayed screen. I am looking for suggestions on how to solve this problem.</p>
  
  <p>I have read that other people have experienced this problem with react-navigation and react-native-navigation. But I did not find solutions.</p>