Trying to JoinRandomRoom for a LobbyType.SqlLobby, but it doesn't work.

private void tryJoinRandomRoom()
{
    PhotonJoinedRoomSignal.AddListener(onJoinedRandomRoom);
    PhotonLeftRoomSignal.AddListener(onLeftRoom);
    PhotonRandomJoinFailedSignal.AddListener(onRandomJoinFailed);
    PhotonPlayerConnectedSignal.AddListener(onPlayerConnected);
    PhotonPlayerDisconnectedSignal.AddListener(onPlayerDisconnected);

    // more filter variations:
    // "C0 = 1 AND C2 > 50"
    // "C5 = \"Map2\" AND C2 > 10 AND C2 < 20"

    
    ExitGames.Client.Photon.Hashtable expectedProperties = new ExitGames.Client.Photon.Hashtable {
        { "Lobby", _dungeonConfig.Name }, // "3v3RandomJungle"
        { "C0", 10} };

    byte maxPlayers = (byte)_dungeonConfig.MaxPlayers;
    _lobby = new TypedLobby() { Name = _dungeonConfig.Name, Type = LobbyType.SqlLobby };
    string sqlFilter = "C0 >= 0 AND C0 < 50";

    PhotonNetwork.JoinRandomRoom(
        expectedProperties,
        maxPlayers,
        MatchmakingMode.SerialMatching,
        _lobby,
        sqlFilter);
}

private void onRandomJoinFailed(object[] result)
{
    PhotonRandomJoinFailedSignal.RemoveListener(onRandomJoinFailed);
    PhotonCreatedRoomSignal.AddListener(onCreatedRoom);

    // more filter variations:
    // "C0 = 1 AND C2 > 50"
    // "C5 = \"Map2\" AND C2 > 10 AND C2 < 20"

    RoomOptions roomOptions = new RoomOptions();
    roomOptions.IsVisible = true;
    roomOptions.IsOpen = true;
    roomOptions.MaxPlayers = (byte)_dungeonConfig.MaxPlayers;
    roomOptions.CustomRoomProperties = new ExitGames.Client.Photon.Hashtable
    {
        { "Lobby", _dungeonConfig.Name },
        { "C0", 20 }
    };
    roomOptions.CustomRoomPropertiesForLobby = new string[] { "C0", "Lobby" };
    roomOptions.PublishUserId = true;


    PhotonNetwork.CreateRoom(
        null,
        roomOptions,
        _lobby);
}