I am not able to see other players

Hi,

I have a multiplayer game with different scenes. All players are instantiated using one script - and they are instantiated in the "Game" scene. Initially, they are able to see each other. But when one player leaves a scene, goes to another, and comes back to the "Game" scene, that player is not able to see others. But others are able to see that player. What is going wrong here? This is the script used to instantiate players:

using System.Collections;
using System.Collections.Generic;
using UnityEngine;
using Photon.Pun;

public class SpawnPlayers : MonoBehaviourPunCallbacks
{
    public GameObject playerPrefab;

    private GameObject playerObject;

    private void Start()
    {
        if (playerObject == null)
        {
            Vector3 randomPosition = new Vector3(0f, 0f, -8f);
            playerPrefab.transform.rotation = Quaternion.Euler(0f, 0f, 0f);

            playerObject = PhotonNetwork.Instantiate("Bork", randomPosition, playerPrefab.transform.rotation);
        }
    }

    private void OnDestroy()
    {
        if (playerObject != null)
        {
            Debug.Log("destroyed");
            PhotonNetwork.Destroy(playerObject);
        }
    }
}