Why my object only disappears when I trigger its animation from cardboard VR?

I'm testing a gaze input method that is shown here. But in my case I'm making a animation play while I'm looking at an object. I have a cube that I animated in unity and when I gaze at it in the Game tab it plays the animation as expected but after build and run, when I gaze at it with my phone, the cube disappears and after a bit appears again. Today is the second day I try different stuff to find what the problem might be but to no avail. Does anybody have a clue why is this happening? Thanks guys.

 using UnityEngine;
 using System.Collections;
 
 public class StartRide : MonoBehaviour {
 
     // How long to look at Menu Item before taking action
     public float timerDuration = 2f;
 
     // This value will count down from the duration
     private float lookTimer = 0f;
 
     // Is player looking at me?
     private bool isLookedAt = false;
 
     private Animator myAnim;
 
     // Camera path
     private GameObject camPath;
     private Animator camAnim;
 
     // MonoBehaviour Start
     void Start()
     {
         // Get camera path
         camPath = GameObject.FindWithTag("CamPath");
 
         // Get camera animation
         camAnim = camPath.GetComponent<Animator>();
 
         // Get my animation
         myAnim = GetComponent<Animator>();
     }
 
     // MonoBehaviour Update
     void Update()
     {
         // While player is looking at me
         if (isLookedAt)
         {
             // Reduce Timer
             lookTimer += Time.deltaTime;
 
             myAnim.Play("CubeAnim");
 
             if (lookTimer > timerDuration)
             {
                 // Reset timer
                 lookTimer = 0f;
 
                 // Do something
                 Debug.Log("BUTTON HAS BEEN SELECTED!");
                 camAnim.Play("Go");
             }
         }
         else {
             // Reset Timer
             lookTimer = 0f;
         }
     }
 
     // Google Cardboard Gaze
     public void SetGazedAt(bool gazedAt)
     {
         // Set the local bool to the one passed from Event Trigger
         isLookedAt = gazedAt;
     }
 }