Method Animator.SetBool sometimes is not working (or not triggering) in Unity2D

I have trouble with Animator in Unity2d. I have a main character for my game. The character has his own animation clip for fighting. When the player touches the screen, i am starting animation. When the player touches the screen slowly (every second) - everything is working fine, but when the player touches the screen fast, the animation clip is playing about 10 times, and then nothing happens (the clip isn't playing). I've checked - the touch event is triggered normaly, may the problem is with animator. Does anyone have ideas how to fix this issue?

     public bool UseAxisInput = false;
     private Animator Anim;
 
     // Use this for initialization
     void Start () {
         Anim = GetComponent<Animator>();
     }
     
     // Update is called once per frame
     void Update () {
             for (var i = 0; i < Input.touchCount; ++i) 
             {        
                 if (Input.GetTouch(i).phase == TouchPhase.Began)     
                 {
                     Anim.SetBool("IsFighting", true);
                 }
             }
         }

May be this is because of that at the end of my animation i have an animation event which calls the method, that stops animation.

 public void stopFighting()
     {
         Anim.SetBool("IsFighting", false);
     }