Ember Inject problem. Inject was injecting currentUser to all controllers except application and index. Passing the promise directly to inject solved this.

Correct

var user = store.find('user', 'current');                                                                                         
container.lookup('controller:currentUser').set('content', user);                                                                  
App.inject('controller', 'currentUser', 'controller:currentUser');      

Incorrect

var user = store.find('user', 'current').then(function(user) {
  container.lookup('controller:currentUser').set('content', user);                                                                  
  App.inject('controller', 'currentUser', 'controller:currentUser');      
});