Why is the object created with scripts disabled, even though everything is enabled in the prefab?

Question

Unity

Just started learning Unity, here is the code.
As soon as the cube reaches a certain mark, it is removed and the same cube is created.
I put the prefab in mems.
The problem is, as soon as the initial cube is deleted, a new cube is generated, but all the scripts that are attached are not active, what's wrong?

public class LiveObject : MonoBehaviour
{
    private Transform _transform;
    public GameObject mems;
    void Start()
    {
        _transform = GetComponent<Transform>();
    }

    void Update()
    {
        print(_transform.position.y);
        if (_transform.position.y < -4f)
        {
            Destroy(gameObject);
            Instantiate(mems, new Vector2(0,0),  Quaternion.identity);
        }
    }
}