Collision issue with SetParent (C#)

I'm developing a 2D game where I have a power up that sets a shield as parent on the player. The shield has it's own tag. But I have a problem, once the player gets the shield, I set it as parent and once an enemy collides with the player and the shield the player dies, making it seem that the player didn't have a shield at all.

I've set the enemies so that they should collide with a "Player" tag and kill the player, but i want to have it so that when the shield is in use, the enemies is going to collide and "bounce" off. Should I ignore the players collision when the player has a shield or is there some other way to solve this? Keep in mind that the enemies move with a speed, so could it be that the enemies move too fast so they still collide with the "Player" tag?

I'm grateful for all the help I can get, you guys are great!!

Here's the code for spawning shield:

 public void SpawnShield()
     {
         // Get the transform ahead of time for readability
         Transform charTransform = GetComponent<MoveScript>().character.transform;
         
         // Instantiate and keep track of the new instance
         GameObject newShield = Instantiate(shield, charTransform.position, charTransform.rotation) as GameObject;
         
         // Set parent
         newShield.transform.SetParent(charTransform);
 
         shieldPowerUpActivated = true;
 
     }

and here is the enemy collision code:

 public void OnCollisionEnter2D(Collision2D col)
     {
         //If the enemy collides with "Player" load level
         if(col.gameObject.tag == "Player")
         {
             Application.LoadLevel(0);    
         }
     }