collision not working after enabling it twice

In a top down shooter i have enemies which randomly spawn. When they spawn they perform a spawn animation. I deactivate the collision in start so u cant get killed unfairly. Void EnemyGo gets activated through an animation event after the animation. My problem is that the collision wont work then. my code:

 public class EnemyMovement : MonoBehaviour
 {
     public Collider2D m_Collider2D;
 
     void Start
     {
         m_Collider2D = GetComponent<CircleCollider2D>();
         m_Collider2D.enabled = false;
     }
 
     void EnemyGo()
     {
          m_Collider2D.enabled = true;
     }
 }

I do the same thing with the rigidbody2d and iskinematic and it works there.