Cocos2d restart scene is blank but showing fps - ios

Question

I have a table view that lists the game maps I have. When I click on one, another storyboard loads containing a cocos2d scene.
The first time I load a scene, everything loads perfectly. However, the second time I try to load the scene (back from the navigation controller and clicking on the same map or another one), I get a blank screen showing the fps but nothing else.
here's my code in mapViewController (that contains the cocos2d)
- (void)setupCocos3D { //called from viewDidLoad
[[CCDirector sharedDirector] setOpenGLView:openGLView];
((ViewInterface*)[ViewInterface sharedViewInterface]).currentScene = [testScene scene];
// Create the customized CC3Layer that supports 3D rendering.
CC3Layer* cc3Layer = [HelloWorldLayer node];
// Create the customized 3D scene and attach it to the layer.
// Could also just create this inside the customer layer.
cc3Layer.cc3Scene = ((ViewInterface*)[ViewInterface sharedViewInterface]).currentScene;
// Assign to a generic variable so we can uncomment options below to play with the capabilities
CC3ControllableLayer* mainLayer = cc3Layer;
mainLayer.contentSize = CGSizeMake(2048, 1320);
[CCDirector sharedDirector].animationInterval = (1.0f / kAnimationFrameRate);
[CCDirector sharedDirector].displayStats = YES;
[[CCDirector sharedDirector] enableRetinaDisplay: YES];
((ViewInterface*)[ViewInterface sharedViewInterface]).mainLayer = mainLayer;
[[CCDirector sharedDirector] runWithScene:((ViewInterface*)[ViewInterface sharedViewInterface]).mainLayer];
}
- (void)viewWillDisappear:(BOOL)animated
{
[super viewWillDisappear:animated];
[[CCDirector sharedDirector] end];
}
It is really strange that I can see the fps therefore it seems that the only problem is either with the scene or the layer.

Answer 1

Is the scene being retained? Could it be getting released and not being re-created?