fruit supplies, bug? I need help Ruby 2DKIT

Hi everyone, I'm having a question, I'm doing a tutorial "Ruby Adventure 2D KIT" so far I did not have problems to do the programming and the settings on the unit, anyway .. I realized that the fruits that give life to Ruby goes exactly when I I get 4 fruits, there's more in the scene, I have the programming and there's nothing limit or something, someone has some idea of this bug.
Note: this occurs when I make a specific path if I change the route of picking the fruit, this does not happen ..
Thank you in advance!

Programming of life fruit


using System.Collections;
using System.Collections.Generic;
using UnityEngine;

public class HealthCollectible : MonoBehaviour
{

void OnTriggerEnter2D(Collider2D other)
{
RubyController controller = other.GetComponent<RubyController>();


if (controller != null)
{
if (controller.health < controller.maxHealth)
{

controller.ChangeHealth(1);
Destroy(gameObject);
}
}
}
}