Companion spawns in default place instead of behind Player

I made the script which moves chosen companion to the place behind Player at the start of the Scene. It works well when I start the game, but when I change Scene (moving character in gameplay) to another and then go back, Player character is in right place, but companion spaws in default place (Inspector values). I have no idea why is this happening...

Companion is on the Scene already as normal GameObject (not Static) and as I said it works after I hit play, but not after changing Scene and coming back.

 using System.Collections;
 using System.Collections.Generic;
 using UnityEngine;
 using UnityEngine.AI;
 
 public class KompanFollow : MonoBehaviour {
 
     System.Random losuj;
     private CharacterController character_Controller;
     public GameObject Player;
     public Animator ani;
     int timer = 0;
     bool destination = false;
     int IdleAni = 0;
     public NavMeshAgent agent;
     GameObject player;
     bool ustawienie = false;
     // Use this for initialization
 
     void Awake()
     {
         character_Controller = GetComponent<CharacterController>();
     }
 
 
     public void Start () {
 
         player = GameObject.Find("PlayerCharacter");
 
         if (player.GetComponent<player>().Ilu_Towarzyszy() == 0)
         {
             Debug.Log("No companion");
             this.gameObject.SetActive(false);
         }
         else if (this.gameObject.name == "Stefka" && player.GetComponent<player>().Kto_Towarzyszy() != 0)
         {
             Debug.Log("No Stefka (companion 0)");
             this.gameObject.SetActive(false);
         }
         else if (this.gameObject.name == "Saifer" && player.GetComponent<player>().Kto_Towarzyszy() != 1)
         {
             Debug.Log("No Saifer (companion 1)");
             this.gameObject.SetActive(false);
         }
 
         if (this.gameObject.activeSelf)
         {
             ani = GetComponent<Animator>();
             losuj = player.GetComponent<PowerOfCreation>().radek;
             IdleAni = losuj.Next(1, 22);
            
            //set companion behind Player
             gameObject.transform.position = new Vector3(player.GetComponent<PowerOfCreation>().positionplayera[0], player.GetComponent<PowerOfCreation>().positionplayera[3], player.GetComponent<PowerOfCreation>().positionplayera[1]);
             gameObject.transform.eulerAngles = new Vector3(gameObject.transform.eulerAngles.x, player.GetComponent<PowerOfCreation>().positionplayera[2], gameObject.transform.eulerAngles.z);
             gameObject.transform.position -= (2 * gameObject.transform.forward);
             
             //player.GetComponent<PowerOfCreation>().positionplayera[0/1/2] is changed on one Scene (before transition to another) and Player character is set in Start function acording to those 3 values, so Player charcater appears on new map in the right place (not same as Inspector position) (and it works!)
         }
     }
 
     // Update is called once per frame
     void Update()
     {
 
         
         
 
 
             if (timer <= 12)
                 timer++;
             else
             {
                 timer = 0;
             }
 
             if (((Player.transform.position) - transform.position).sqrMagnitude > 13)
             {
                 if (timer == 12)
                 {
                     agent.SetDestination(Player.transform.position);
                     destination = true;
                 }
 
                 if (destination)
                 {
                     agent.isStopped = false;
                     ani.Play("RUN");
                 }
 
             }
             else
             {
                 agent.ResetPath();
                 agent.isStopped = true;
                 destination = false;
                 ani.Play("IDLE" + IdleAni);
             }
 
 
         
     }
 }