Duet Game Problem

I'm re-making the DUET game and found out some problems. The problem is that when my player hits an obstacle, most of the time it works, sometimes both two "balls" disappeared, sometimes they are still moving up, even though I have a script to make it stop. These are my codes:

 // Player Moving Up Script
 using System.Collections;
 using System.Collections.Generic;
 using UnityEngine;
 
 public class PlayerUp : MonoBehaviour
 {
 
     public float upVelocity = 5f;
     private Rigidbody2D rb;
 
     void Start()
     {
         rb = GetComponent<Rigidbody2D>();
     }
 
     void Update()
     {
         rb.velocity = Vector2.up * upVelocity;
     }
 }

Rotate the player:

 using System.Collections;
 using System.Collections.Generic;
 using UnityEngine;
 
 public class PlayerRotator : MonoBehaviour
 {
 
     #region Variables
 
     public float rotateSpeed = 120f;
 
     Rigidbody2D rb;
 
     void Start()
     {
         rb = GetComponent<Rigidbody2D>();
     }
 
     void Update()
     {
         float horizontal = Input.GetAxisRaw("Horizontal");
         transform.Rotate(0f, 0f, -horizontal * rotateSpeed * Time.deltaTime);
 
     }
 }

PlayerCollision:

 using System.Collections;
 using System.Collections.Generic;
 using UnityEngine;
 using UnityEngine.SceneManagement;
 
 public class PlayerCollision : MonoBehaviour
 {
 
     #region Variables
 
     private bool isRestart = false;
     private bool camStop = false;
     private bool playerStop = false;
     private bool playerRotate = false;
 
     public Transform[] childTransforms;
 
     public Rigidbody2D rb;
     public FollowPlayer follow;
     private PlayerUp playerUp;
     private PlayerRotator rotator;
 
     void Start()
     {
         playerUp = GetComponent<PlayerUp>();
         rotator = GetComponent<PlayerRotator>();
     }
 
     void OnCollisionEnter2D(Collision2D collision)
     {
         if (collision.transform.tag == "Obstacle")
         {
             StopMoving();
             Invoke("RestartLevel", 1.5f);
         }
     }
 
     void StopMoving()
     {
         if (camStop == false)
         {
             camStop = true;
             follow.enabled = false;
         }
 
         if (playerStop == false)
         {
             playerStop = true;
             playerUp.enabled = false;
         }
 
         if (playerRotate == false)
         {
             playerRotate = true;
             rotator.enabled = false;
         }
     }
 
     void RestartLevel()
     {
         if (isRestart == false)
         {
             isRestart = true;
             SceneManager.LoadScene(SceneManager.GetActiveScene().name);
             transform.rotation = Quaternion.identity;
         }
 
     }
 }

Ball Children Collision (their parent is an empty gameobject)

 using System.Collections;
 using System.Collections.Generic;
 using UnityEngine;
 using UnityEngine.SceneManagement;
 
 public class PlayerCollision : MonoBehaviour
 {
     private bool isRestart = false;
     private bool camStop = false;
     private bool playerStop = false;
     private bool playerRotate = false;
 
     public Transform[] childTransforms;
 
     public Rigidbody2D rb;
     public FollowPlayer follow;
     private PlayerUp playerUp;
     private PlayerRotator rotator;
 
     void Start()
     {
         playerUp = GetComponent<PlayerUp>();
         rotator = GetComponent<PlayerRotator>();
     }
 
     void OnCollisionEnter2D(Collision2D collision)
     {
         if (collision.transform.tag == "Obstacle")
         {
             StopMoving();
             Invoke("RestartLevel", 1.5f);
         }
     }
 
     void StopMoving()
     {
         if (camStop == false)
         {
             camStop = true;
             follow.enabled = false;
         }
 
         if (playerStop == false)
         {
             playerStop = true;
             playerUp.enabled = false;
         }
 
         if (playerRotate == false)
         {
             playerRotate = true;
             rotator.enabled = false;
         }
     }
 
     void RestartLevel()
     {
         if (isRestart == false)
         {
             isRestart = true;
             SceneManager.LoadScene(SceneManager.GetActiveScene().name);
             transform.rotation = Quaternion.identity;
         }
 
     }
 }

Thanks in advance guys!!