Using Photon after leaving room user can't connect to room by name

Questions & Answers
,
1

Users connect to lobby:

private void Start()
{
    PhotonNetwork.ConnectUsingSettings();
}

public override void OnConnectedToMaster()
{
    PhotonNetwork.JoinLobby();
    SceneManager.LoadScene("Lobby");
}

Then users create room or enter in a room by its name:

private bool CheckNullOrEmpty(string name)
{
    return !string.IsNullOrEmpty(name);
}

private bool CheckServerAvaliable(string qwe)
{
	bool isAvaliable = true;

	foreach (var item in _roomList)
	{
		RoomInfo info = item.Value;

		if (info.Name == qwe)
		{
			isAvaliable = false;
		}

        Debug.Log(_roomList);
	}

	return isAvaliable;
}

private void SetNickname()
{
    PhotonNetwork.NickName = _nickname.text;
    PlayerPrefs.SetString("name", _nickname.text);
}

private void CreateRoom()
{
	RoomOptions roomOptions = new() { MaxPlayers = _maximumPlayers };
	PhotonNetwork.CreateRoom(_createServer.text, roomOptions);
}

public void TryCreateRoom()
{
    if (CheckNullOrEmpty(_createServer.text) && CheckServerAvaliable(_createServer.text) && CheckNullOrEmpty(_nickname.text))
    {
        SetNickname();

        CreateRoom();
    }

    else if (!CheckNullOrEmpty(_nickname.text))
    {
        _errorText.SetText("Nickname cannot contain only spaces or be empty");
    }

    
    else if (!CheckServerAvaliable(_createServer.text))
    {
        _errorText.SetText("The name of the room is occupied");
    }
}

public void TryJoinRoom()
{
	if (!CheckServerAvaliable(_joinServer.text))
	{
        SetNickname();

        PhotonNetwork.JoinRoom(_joinServer.text);
    }

    else if (!CheckNullOrEmpty(_nickname.text))
    {
        _errorText.SetText("Nickname cannot contain only spaces or be empty");
    }

    else if (CheckServerAvaliable(_joinServer.text))
    {
        _errorText.SetText("There is no room with such name");
    }
}
private void UpdateCachedRoomList(List<RoomInfo> roomList)
{
	for (int i = 0; i < roomList.Count; i++)
	{
		RoomInfo info = roomList[i];
		if (info.RemovedFromList)
		{
			_roomList.Remove(info.Name);
		}
		else
		{
			_roomList[info.Name] = info;
		}
	}
}

public override void OnRoomListUpdate(List<RoomInfo> roomList)
{
	UpdateCachedRoomList(roomList);
}

public override void OnJoinedRoom()
{
    PhotonNetwork.LoadLevel("Game");
}

Everything works well, then users leave room and enter lobby:

 public void Leave()
{
	PhotonNetwork.LeaveRoom();
	SceneManager.LoadScene("Lobby");
}

In lobby creating room works fine, but entering to room doesn’t work, i get - There is no room with such name. I commented verification of server existing, and then user connected, i don’t understand what is the problem in verification