How do I use createTypedArrayList correctly from the Parcelable interface?

My problem is that when recovering an array list typed after using the parcelable interface there is an arraylist that only has to have 2 objects and has more than 6 million generally.

This is class BaseDeDatos . It is responsible for keeping all the information. The program works well until you want to recover the arraylist of clients, there you are thinking for a while and then you throw away that you have 7 million elements and the arrays that follow have zero size when in reality they would have to have objects too.

@Override
public int describeContents() {
    return 0;
}

@Override
public void writeToParcel(Parcel parcel, int i) {
    parcel.writeString(TAG);
    parcel.writeString(nombrePreventista);
    parcel.writeTypedList(productoStocks);
    parcel.writeTypedList(clientes);
    parcel.writeStringList(arrayClientes);
    parcel.writeStringList(arrayProductos);
    parcel.writeTypedList(arrayELV);
}

protected BaseDeDatos(Parcel in) {
    TAG = in.readString();
    nombrePreventista = in.readString();
    productoStocks = in.createTypedArrayList(ProductoStock.CREATOR);
    clientes = in.createTypedArrayList(Cliente.CREATOR);
    arrayClientes = in.createStringArrayList();
    arrayProductos = in.createStringArrayList();
    arrayELV = in.createTypedArrayList(ChildGroup.CREATOR);
    DB = VentanaPrincipal.PasarDB();
}

public static final Creator<BaseDeDatos> CREATOR = new Creator<BaseDeDatos>() {
    @Override
    public BaseDeDatos createFromParcel(Parcel in) {
        return new BaseDeDatos(in);
    }

    @Override
    public BaseDeDatos[] newArray(int size) {
        return new BaseDeDatos[size];
    }
};

This is a photo of the step by step debugging.

This is the code for the Client class.

public class Cliente implements Parcelable {
private String nombre;
private String direccion;
private String plazosEntrega;
private String observaciones;


@Override
public int describeContents() {
    return 0;
}

@Override
public void writeToParcel(Parcel parcel, int i) {
    parcel.writeString(nombre);
    parcel.writeString(direccion);
    parcel.writeString(plazosEntrega);
    parcel.writeString(observaciones);
}

protected Cliente(Parcel in) {
    nombre = in.readString();
    direccion = in.readString();
    plazosEntrega = in.readString();
    observaciones = in.readString();
}

public static final Parcelable.Creator<Cliente> CREATOR = new Parcelable.Creator<Cliente>() {
    @Override
    public Cliente createFromParcel(Parcel in) {
        return new Cliente(in);
    }

    @Override
    public Cliente[] newArray(int size) {
        return new Cliente[size];
    }
};
}

I do not know what else to try, the class productoStock has implemented the methods of the interfaz serializable in the same way as the class Cliente , but in it if it works.