OnTriggerEnter2d doesn't work without a player move before

Hi, I'm trying to make my player attack, so I found some example implementation and there is one:
so I'm following this video:

there is a github:
https://github.com/Tutorials-By-Kaupenjoe/Basic-Unity-2020.3-Tutorials/tree/8-playerAttacking/Assets

The problem is OnTriggerEnter2D only works once; to work it again I have to move a player.
So if I stay, doesn't affect enemy more than once. In inspector I see its called again, but it does nothing to enemy.

Code (CSharp):

1. public class AttackArea : MonoBehaviour
2. {
3.     [SerializeField] private int damage = 3;
4.  
5.    private void OnTriggerEnter2D(Collider2D collider)
6.     {
7.         if(collider.GetComponent<Health>() != null)
8.         {
9.             Health health = collider.GetComponent<Health>();
10.             health.Damage(damage);
11.         }
12.     }

Someone in comments has the same issue, in video works as it should be. Cannot move futher without attack script stucked second day.
Any one know why this works like that?

 

you probably want ontriggerstay

 

As I tried its even weired.


Fixed it. The AREA ATTACK hadn't Rigidbody2d. I though like inisible area of attack doesn't need it. The thing I don't understand why it worked without RB2D but only noticing its once.

Thanks for answer!

SS: