game freezes on devices but plays well on pc.

this is the code for the collide (the pirate and the slash one work fine game freezes when the bullet collides)

  void OnTriggerEnter2D(Collider2D col)
         {
             if (col.gameObject.name == "pirate")
             {
                 AudioSource audio = GetComponent<AudioSource>();
                 audio.Play();           
                 nikise = true;
                 Destroy(this.gameObject,0.3f);
                 Destroy(transform.parent.gameObject,0.3f);
             }
             if(col.gameObject== bullet)
             {
                 tempHealth -= 1;
             }
             if (col.gameObject.name == "slash")
             {
                 swordCol = true;
                 tempHealth -= 3;
             }
         }

(In the update i have this) bullet = GameObject.Find("Bullet(Clone)"); (i also tried "col.gameObject== Bullet(Clone)");

this code is in the bullet for it to be destroyed if it collides with the monkey

 void OnTriggerEnter2D(Collider2D col)
     {
         if (col.gameObject.name == "monkey")
         {
             Destroy(this.gameObject);
         }
     }