renderer.enabled working on PC but not android?

This is confusing me, I'm not quite sure what's going on. I'm trying to enable/disable the renderers of a set of child gameObjects. Testing it in the editor, it works perfectly. When I build it out and try it on my tablet, it doesn't work at all.

All of my test variables behave as expected, except one: whichObject.transform.GetChild(0).renderer.enabled returns 'false' every time on android, regardless of the state of the game object. Anyone know why?

         if(Input.touchCount > 0 && Input.GetTouch(0).phase == TouchPhase.Began){

                 Ray ray = guiCamera.ScreenPointToRay(Input.GetTouch (0).position);
                 RaycastHit hit;
             
                 if(Physics.Raycast (ray, out hit, guiLayerMask)){
                     testButton = "Hit Button: "+hit.collider.transform.parent.name;
                     WhichButtonPressed(hit.collider.transform.parent.name);
                 }
         }

Skipping down to the relevant bit:

     case "removeExtWalls" : 
                 testButton = "removeExtWalls"; //To make sure I'm actually presssing the building
                 whichObject = GameObject.FindWithTag("extWalls");
                 turnOn = !whichObject.transform.GetChild(0).renderer.enabled;
                 testObject = whichObject.name;
                 testButtonStatus = whichObject.transform.GetChild(0).renderer.enabled.ToString(); //Always returns 'true' on android, changes as expected in editor
                 foreach(Transform subObject in whichObject.transform){
                     subObject.renderer.enabled = false;
                 }
                 break;