title: Libgdx app.exit() on Android not closing application
body: <p>In my Android app developed with libGDX I use <code>Gdx.app.exit()</code> when the user tries to exit the game. This closes the game, but when the user restarts the app all the <code>Textures</code> are scrambled (beyond the point of using the app).
  I noticed that if I force close the app from a task-manager, then it will restart properly. </p>
  
  <p>Why does it happen?</p>