Input registering random touches

Hello, I have a canvas which I touch with only 2 fingers, but sometimes Unity is registering a third touch.

Here's the captured image.

My left thumb was pressing position 0, and my right thumb was spamming position 1. At iteration 222, Unity registered a third touch, on position 2.

Any idea how this happens? This bug is killing my game.. Help!

Here's the code of Input Test

 using System.Collections;
 using System.Collections.Generic;
 using UnityEngine;
 using UnityEngine.EventSystems;
 using UnityEngine.UI;
 
 public class InputTest : MonoBehaviour, IPointerDownHandler
 {
     public GameObject textPrefab;
 
     public void OnPointerDown(PointerEventData eventData)
     {
         Debug.Log("Touch count : " + Input.touchCount);
 
         if (Input.touchCount >= 3) {
             for (int i = 0; i < Input.touchCount; i++) {
                 Debug.Log("Input.touches[" + i + "].position : " + Input.touches[i].position);
 
                 //Create UI text to show finger ID
                 GameObject goTemp = GameObject.Instantiate(textPrefab, this.transform.parent);
                 goTemp.GetComponent<Text>().text = Input.touches[i].fingerId.ToString();
                 goTemp.transform.position = Input.touches[i].position;
                 goTemp.SetActive(true);
             }
         }
         Debug.Log("=== EVENT DATA ====");
         Debug.Log("event Data id : " + eventData.pointerId);
         Debug.Log("===================");
 
     }
 }