Problem with OnTriggerEnter

Please if someone could help me with this, i tried everything and nothing worked.

In the game I'm making in order to call a dead state I'm using a box collider to track if the player enters in a particular zone, but the problem is that it only tracks it if I'm pressing any of the a,s,d or w keys in the keyboard.

This is the code.

The OnTriggerEnter is call in line 48.

 using UnityEngine;
 using System.Collections;
 
 public class PlayerManager : MonoBehaviour
 {
     public bool Death = false;
     public bool Alive = false;
     public bool Muerto;
     public GameObject Generador;
     public GameObject StartButton;
     public CharacterMotor Motor;
     public static PlayerManager Instanse;
 
     // Use this for initialization
     void Start()
     {
         Instanse = this;
     }
 
     // Update is called once per frame
     void Update()
     {
         if (gameObject.transform.position.y <= -3.5f)
             Death = true;
 
         if (!Alive)
             Generador.transform.position = new Vector3(0, -0.57f, -4.12f);
 
         if (Death)
         {
             Generador.transform.position = new Vector3(0, -0.57f, -4.12f);
             GenerateManager.Instante.BeforeObject = GenerateManager.Instante.Spawn;
             Motor.canControl = false;
             StartButton.SetActive(true);
             CameraMovement.Instanse.CanMoveCamera = false;
             gameObject.transform.position = new Vector3(0.46f, 1.102971f, -6);
             Camera.main.transform.position = new Vector3(-0.07402526f, 12.0031f, -1.937099f);
             foreach (GameObject gm in GenerateManager.Instante.BloquesGenerados)
             {
                 Destroy(gm);
             }
             GenerateManager.Instante.BloquesGenerados.Clear();
             Death = false;
 
         }
     }
 
     void OnTriggerEnter(Collider other)
     {
         if (other.gameObject.tag == "Generador")
             GenerateManager.Instante.DoGenerate = true;
         if (other.gameObject.tag == "Muerte")
         {
             Alive = false;
             Death = true;
         }
     }
 }

If someone can help me fix this i will be very grateful.