Question Can't switch VR back on

Hi
I need to toggle between VR and standard format for my app. I start in 2d then switch to VR which works fine. I then go back to 2D, again no problem but when I then try to go back into VR, the screen doesn't split and I have to restart my app as I lose control over the scene (gvrpointer doesn't work)

I am using the following code to switch on VR:

Code (CSharp):

1.  public void Start()
2.     {
3.  
4.         StartXR();
5.     }
6.     public void StartXR()
7.     {
8.         Debug.Log("VR starting");
9.         XRGeneralSettings.Instance.Manager.InitializeLoaderSync();
10.         XRGeneralSettings.Instance.Manager.StartSubsystems();
11.     }
12.  

and this to stop it

Code (CSharp):

1.     void Start()
2.     {
3.         if (XRGeneralSettings.Instance.Manager.activeLoader != null)
4.         {
5.             XRGeneralSettings.Instance.Manager.activeLoader.Stop();
6.             XRGeneralSettings.Instance.Manager.activeLoader.Deinitialize();
7.             Debug.Log("XR stopped completely.");
8.         }
9.     }

Strangely whilst I get the debug from StartXR() each time i move in and out of VR in the Editor I don't ever see "XR stopped completely" but I do switch to standard mode.

I can toggle between the screens in Editor and everything works fine. This problem only occurs on Android and iPhone.

thanks