Detecting hovering on button event on Oculus Quest (Unity3D)

Stack:

Oculus Quest Unity 2019.3 Oculus VR Integration macOS Catilina I have a Unity scene with a VR interface composed by a Canvas (World Space coordinates) and two buttons. The canvas has attached an OVR Raycaster objects which uses a laser pointer. Overall it works well, but when I try to intercept the event produced by hovering the laser pointer on the button, I can get only the click event.

I'm using the following script (attached to the button):

 using System.Collections;
 using System.Collections.Generic;
 using UnityEngine;
 using UnityEngine.EventSystems;
 public class VRButton : MonoBehaviour, IPointerEnterHandler, IPointerClickHandler, ISelectHandler
 {
     // Start is called before the first frame update
     void Start()
     {
 
     }
 
     // Update is called once per frame
     void Update()
     {
 
     }
 
     public void OnPointerEnter(PointerEventData eventData)
     {
         Debug.Log("Enter!");
         transform.localScale *= 1.2f;
     }
 
     public void OnPointerExit(PointerEventData eventData)
     {
         Debug.Log("Exit!");
         transform.localScale /= 1.2f;
     }
 
     public void OnPointerClick(PointerEventData eventData)
     {
         Debug.Log("Clicked!");
     }
 }

The strange thing is that both OnPointerEnter and OnPointerClick get called when I point the button with the laser and click. Just hovering the doesn't trigger any event (nor OnPointerExit or OnPointerEnter).

This is my ADB log:

 03-15 22:59:53.085 13339 13355 I Unity   : Clicked!
 03-15 22:59:53.085 13339 13355 I Unity   : UnityEngine.Logger:Log(LogType, Object)
 03-15 22:59:53.085 13339 13355 I Unity   : UnityEngine.EventSystems.EventFunction`1:Invoke(T1, BaseEventData)
 03-15 22:59:53.085 13339 13355 I Unity   : UnityEngine.EventSystems.ExecuteEvents:Execute(GameObject, BaseEventData, EventFunction`1)
 03-15 22:59:53.085 13339 13355 I Unity   : UnityEngine.EventSystems.OVRInputModule:ProcessMousePress(MouseButtonEventData)
 03-15 22:59:53.085 13339 13355 I Unity   : UnityEngine.EventSystems.OVRInputModule:ProcessMouseEvent(MouseState)
 03-15 22:59:53.085 13339 13355 I Unity   :  
 03-15 22:59:53.085 13339 13355 I Unity   : (Filename: ./Runtime/Export/Debug/Debug.bindings.h Line: 35)
 03-15 22:59:53.085 13339 13355 I Unity   : 
 03-15 22:59:53.085 13339 13355 I Unity   : Enter!
 03-15 22:59:53.085 13339 13355 I Unity   : UnityEngine.Logger:Log(LogType, Object)
 03-15 22:59:53.085 13339 13355 I Unity   : VRButton:OnPointerEnter(PointerEventData)
 03-15 22:59:53.085 13339 13355 I Unity   : UnityEngine.EventSystems.EventFunction`1:Invoke(T1, BaseEventData)
 03-15 22:59:53.085 13339 13355 I Unity   : UnityEngine.EventSystems.ExecuteEvents:Execute(GameObject, BaseEventData, EventFunction`1)
 03-15 22:59:53.085 13339 13355 I Unity   : UnityEngine.EventSystems.BaseInputModule:HandlePointerExitAndEnter(PointerEventData, GameObject)
 03-15 22:59:53.085 13339 13355 I Unity   : UnityEngine.EventSystems.OVRInputModule:ProcessMousePress(MouseButtonEventData)
 03-15 22:59:53.085 13339 13355 I Unity   : UnityEngine.EventSystems.OVRInputModule:ProcessMouseEvent(MouseState)

How can I fix it?