title: PlayerPrefs in unity does not work properly
body: <p>I'm developing a game for Android in Unity 5.6.3f1 and have a problem with <code>PlayerPrefs</code>.</p>
  
  <p>This is my code: </p>
  
  <pre><code>PlayerPrefs.DeleteKey(Key1);
  PlayerPrefs.DeleteKey(Key2);
  PlayerPrefs.Save();
  SceneManager.LoadScene(0);
  </code></pre>
  
  <p>After this block of code, when I check in the new scene, Key1 is deleted but Key2 still exists.</p>
  
  <p>I have no idea why this is happening. Any help or solution would be appreciated.</p>