Disable ui when controller connected mobile

I have tried a few different ways and it disables the UI but when disconnecting the controller to go back to on-screen stick the app just freezes

One Way i tried

Code (CSharp):

1. else if (playerInput.currentControlScheme == "Touch" )
2.         {
3.  
4.             var DS4Controller = DualShock4GampadiOS.current;
5.  
6.             if (DS4Controller != null)
7.             {
8.                 mobileUI.SetActive(false);
9.             }
10.             else
11.             {
12.                 mobileUI.SetActive(true);
13.             }
14.       }
15.