Multithreaded rendering on Galaxy Note 4 (Android 5.0.1) fails

I'm loading my game scene from the start menu scene asynchronously:

     IEnumerator LoadLevelAsync(string sceneName)
     {
         var asyncOp = Application.LoadLevelAsync(sceneName);
         while(!asyncOp.isDone)
         {
             loadProgressImage.fillAmount = asyncOp.progress;                        
             yield return null;
         }
         loadProgressImage.fillAmount = 1f;        
         yield return null;
     }

 //It gets called from another couroutine as follows:
         Debug.Log("Going to start loading level");
         yield return StartCoroutine( LoadLevelAsync(levelToLoad)); 
         Debug.Log("Finished loading level");

The level loads on all devices, but on the Galaxy Note 4, the coroutine never finishes. I think the asyncOp.isDone never gets set to true even though the scene is loaded in the background (the game starts and I can hear my character running and picking up stuff). This works on other Android devices and iOS.

Maybe it has nothing to do with LoadAsync - maybe there's an error with the scene that I'm loading. Any ideas on how to get a crash log from a remote device (user is in another country).

When I turn off multithreaded rendering, the level loads on the Note 4, but all other devices run at a much slower FPS.

Has anyone else run into this problem?