StopAllCoroutines not interrupting an AI attack.

Hello, I am creating a Smash Bros like fighting game and the AI is attacking correctly. However, I another character successfully hits them in the startup-lag of the attack, they complete the attack regardless. This gets especially annoying if the other character grabbed them.

Interrupt Snippet

 function InterruptAllAttacks () {
         Debug.Log(gameObject.name + " Was Interrupted.");
         animation.Stop();
         GetComponent(SpecialController).InterruptSpecialAttacks();
         GetComponent(GrabAndThrow).StopAllCoroutines();
         GetComponent(FighterControllerNew).canMove = false;
         if(GetComponent(AI)) {
             GetComponent(AI).CancelInvoke("CheckAttack");
             GetComponent(AI).checking = false;
         }
         GetComponent(AttackControllerNew).StopAllCoroutines();
     }

AI Attack controls

 function CheckAttack () {
         checking = true;
         var pos = transform.TransformPoint(forwardHitPosition);
         var pos2 = transform.TransformPoint(upwardHitPosition);
         var pos3 = transform.TransformPoint(downwardHitPosition);
         var pos4 = transform.TransformPoint(backwardHitPosition);
         var enemies : GameObject[] = GameObject.FindGameObjectsWithTag("Hurtbox");
         for (var go : GameObject in enemies) {
             var enemy = go.GetComponent(Hurtbox);
             if (enemy == null)
                 continue;
                 
             if(enemy.num == attacker.playerNo) {
                 continue;
             }
             
             if(enemy.type == "Item") {
                 continue;
             }
             
             var rand = 0;
             var num = 0;
             var otherNum = 0;
             if(rand == 0) {
                 if (Vector3.Distance(enemy.transform.position, pos) < forwardHitRadius)
                 {
                     if(!attacker.busy && controller.OnGround()) {
                         num = Random.Range(0, 5);
                         var forwardAttacks : String[] = ["normalA", "sideTilt", "sideSmash", "downTilt", "downSmash"];
                         attacker.Attack(forwardAttacks[num]);
                     } else if(!attacker.busy) {
                         attacker.Attack("forward");
                     }
                 }
                 
                 if (Vector3.Distance(enemy.transform.position, pos2) < upwardHitRadius)
                 {
                     if(!attacker.busy && controller.OnGround()) {
                         otherNum = Random.Range(0, 2);
                         var upwardAttacks : String[] = ["upTilt", "upSmash"];
                         attacker.Attack(upwardAttacks[otherNum]);
                     } else if(!attacker.busy) {
                         attacker.Attack("upward");
                     }
                 }
                 
                 if (Vector3.Distance(enemy.transform.position, pos3) < downwardHitRadius)
                 {
                     if(!attacker.busy && controller.OnGround()) {
     
                     } else if(!attacker.busy) {
                         attacker.Attack("downward");
                     }
                 }
                 
                 if (Vector3.Distance(enemy.transform.position, pos4) < backwardHitRadius)
                 {
                     if(!attacker.busy && controller.OnGround()) {
                         attacker.Attack("downSmash");
                     } else if(!attacker.busy) {
                         attacker.Attack("backward");
                     }
                 }
             }
         }
         yield WaitForSeconds(waitTime);
         checking = false;
     }
 

Any an all help is much appreciated.