Unity AR Foundation: Raycast to instantiated objects

Hi,
I did the AR Foundation tutorial

Instead of the plane I have a small village and now I would like to click on the individual houses with a Raycast to get the names of it.
Unfortunately this does not work for me. I have BoxCollider around my houses and Unity also has no error message.
I also found this video

and rebuilt it with Vuforia and it works here. Does this not work here with ARFoundation?

This is the code:

Code (CSharp):

1.     private Text label;
2.     private GameObject bg_label;
3.  
4.     // Use this for initialization
5.     void Start()
6.     {
7.         label = GameObject.Find("LabelName").GetComponent<Text>();
8.         label.text = "";
9.  
10.         bg_label = GameObject.Find("BgLabel");
11.         bg_label.SetActive(false);
12.     }
13.  
14.     // Update is called once per frame
15.     void Update()
16.     {
17.  
18.         if ((Input.GetTouch(0).phase == TouchPhase.Stationary) || (Input.GetTouch(0).phase == TouchPhase.Moved && Input.GetTouch(0).deltaPosition.magnitude < 1.2f))
19.         {
20.             Ray ray = Camera.main.ScreenPointToRay(Input.GetTouch(0).position);
21.             RaycastHit hit;
22.             if (Physics.Raycast(ray, out hit))
23.             {
24.                 bg_label.SetActive(true);
25.                 label.text = hit.transform.name.ToString();
26.             }
27.             else
28.             {
29.                 bg_label.SetActive(false);
30.                 label.text = "";
31.             }
32.         }
33.     }

Thank you
Lukas

 

Same for me actually. What I know is that the touch is off by a lot. If you try to tap a GO, you have to tap it indirectly which sucks. Perhaps it has to do with the collider placements.