Swipe Detection Script not working as intended

I have this script for detection of swipes, but whenever I swipe, the output is either 2, 3, or 4 swipes. I only want the swipe to be detected once, so this is not optimal for me.

 using System;
 using UnityEngine;
 using UnityEngine.Events;
 using UnityEngine.EventSystems;
 using UnityEngine.UI;
 
 public class SwipeDetector : MonoBehaviour
 {
     private Vector2 fingerDown;
     private Vector2 fingerUp;
     public bool detectSwipeOnlyAfterRelease = false;
     public UnityEvent OnUpSwipe;
     public UnityEvent OnDownSwipe;
     public UnityEvent OnLeftSwipe;
     public UnityEvent OnRightSwipe;
     public float SWIPE_THRESHOLD = 20f;
     private bool isJumping = true;
     // Update is called once per frame
     void Update()
     {
 
         foreach (Touch touch in Input.touches)
         {
             if (touch.phase == TouchPhase.Began)
             {
                 fingerUp = touch.position;
                 fingerDown = touch.position;
             }
 
             //Detects Swipe while finger is still moving
             if (touch.phase == TouchPhase.Moved)
             {
                 if (!detectSwipeOnlyAfterRelease)
                 {
                     fingerDown = touch.position;
                     checkSwipe();
                 }
             }
 
             //Detects swipe after finger is released
             if (touch.phase == TouchPhase.Ended)
             {
                 fingerDown = touch.position;
                 checkSwipe();
             }
         }
     }
 
     void checkSwipe()
     {
         //Check if Vertical swipe
         if (verticalMove() > SWIPE_THRESHOLD && verticalMove() > horizontalValMove())
         {
             //Debug.Log("Vertical");
             if (fingerDown.y - fingerUp.y > 0)//up swipe
             {
                 OnSwipeUp();
             }
             else if (fingerDown.y - fingerUp.y < 0)//Down swipe
             {
                 OnSwipeDown();
             }
             fingerUp = fingerDown;
         }
 
         //Check if Horizontal swipe
         else if (horizontalValMove() > SWIPE_THRESHOLD && horizontalValMove() > verticalMove())
         {
             //Debug.Log("Horizontal");
             if (fingerDown.x - fingerUp.x > 0)//Right swipe
             {
                 OnSwipeRight();
             }
             else if (fingerDown.x - fingerUp.x < 0)//Left swipe
             {
                 OnSwipeLeft();
             }
             fingerUp = fingerDown;
         }
 
         //No Movement at-all
         else
         {
             //Debug.Log("No Swipe!");
         }
     }
 
     float verticalMove()
     {
         return Mathf.Abs(fingerDown.y - fingerUp.y);
     }
 
     float horizontalValMove()
     {
         return Mathf.Abs(fingerDown.x - fingerUp.x);
     }
 
     //////////////////////////////////CALLBACK FUNCTIONS/////////////////////////////
     void OnSwipeUp()
     {
         if(isJumping == false){
             isJumping = true;
             Debug.Log("Swipe UP");
             OnUpSwipe.Invoke();
         }
 
     }
 
     void OnSwipeDown()
     {
         Debug.Log("Swipe Down");
         OnDownSwipe.Invoke();
     }
 
     void OnSwipeLeft()
     {
         Debug.Log("Swipe Left");
         OnLeftSwipe.Invoke();
     }
 
     void OnSwipeRight()
     {
         Debug.Log("Swipe Right");
         OnRightSwipe.Invoke();
     }
     public void OnLanding(){
         isJumping = false;
     }
 }