TableView enables buttons in a column when scrolling

I have the following problem I have a TableView in JavaFX has 3 columns of which the last column is a button. The situation is that the button must be un-enabled for the first 5 records of the table, but if the table has a scroll long enough so that these lines disappear when they reappear they are rehabilitated.

If I add the following code, the problem does not happen but the events of the buttons are also disabled

tblCamposMaestro.addEventFilter( Event.ANY, scrollEvent -> {
        tblCamposMaestro.refresh();
    });

Try this code but it does not work for some reason beyond my comprehension:

tblCamposMaestro.addEventFilter( ScrollEvent.ANY, scrollEvent -> { tblCamposMaestro.refresh(); });

The table is filled in the following way:

introducir el código aquí 
 private void crearColumnas(){
    columnaNombre = new TableColumn("Nombre");
    columnaTipo = new TableColumn("Tipo");
    columnaEliminar = new TableColumn("Eliminar");

    columnaNombre.prefWidthProperty().bind(tabla.widthProperty().divide(3));
    columnaTipo.prefWidthProperty().bind(tabla.widthProperty().divide(3));
    columnaEliminar.prefWidthProperty().bind(tabla.widthProperty().divide(3));

    columnaNombre.setCellFactory(new Callback<TableColumn<Object, String>, TableCell<Object,String>>(){
    @Override 
    public TableCell<Object, String> call(TableColumn<Object, String> param){
        TableCell tc = new TableCell<Object, String>(){
            @Override 
            protected void updateItem(String item, boolean empty){
                super.updateItem(item, empty);
                if (getIndex() >= 0 && getIndex() <campos.size()) {
                    setAlignment(Pos.CENTER);
                    setText(""+ campos.get(getIndex()).getNombre());
                }
            }
        };
        return tc;
     }
    });
    columnaTipo.setCellFactory(new Callback<TableColumn<CampoBD, String>, TableCell<CampoBD,String>>(){
    @Override 
    public TableCell<CampoBD, String> call(TableColumn<CampoBD, String> param){
        TableCell tc = new TableCell<Object, String>(){
            @Override 
            protected void updateItem(String item, boolean empty){
                super.updateItem(item, empty);
                if (getIndex() >= 0 && getIndex() <campos.size()) {
                    setAlignment(Pos.CENTER);
                    setText(""+ campos.get(getIndex()).getTipo());
                }
            }
        };
        return tc;
     }
    });




    columnaEliminar.setCellValueFactory( new PropertyValueFactory<>( "DUMMY" ) );

    Callback<TableColumn<CampoBD, String>, TableCell<CampoBD, String>> cellFactory = //
            new Callback<TableColumn<CampoBD, String>, TableCell<CampoBD, String>>()
            {
                @Override
                public TableCell call( final TableColumn<CampoBD, String> param )
                {
                    final TableCell<CampoBD, String> cell = new TableCell<CampoBD, String>()
                    {

                        final Button btn = new Button( "Eliminar" );

                        @Override
                        public void updateItem( String item, boolean empty )
                        {
                            super.updateItem( item, empty );
                            if ( empty )
                            {

                            }
                            else
                            {
                                if (getIndex()< 5) {

                                setGraphic( btn );
                                btn.setDisable(true);
                                setAlignment(Pos.CENTER);
                                setText( null );
                                }
                                else
                                {
                                btn.setOnAction( ( ActionEvent event ) ->
                                {
                                            CampoBD person = getTableView().getItems().get( getIndex() );
                                            System.out.println( person.getNombre()+ "   " + person.getTipo());
                                } );
                                setGraphic( btn );
                                setAlignment(Pos.CENTER);
                                setText( null );
                                }
                            }
                        }
                    };
                    return cell;
                }

    };
    tabla.addEventFilter(ScrollEvent.ANY, scrollEvent -> {
        tabla.refresh();

        // close text box
        tabla.edit(-1, null);
    });

                 columnaEliminar.setCellFactory( cellFactory );
 }

    public void actualizar(List<CampoBD> alumnos) 
    {
    this.campos = FXCollections.observableArrayList(alumnos);
    tabla.setItems(this.campos);
    tabla.addEventFilter(ScrollEvent.ANY, scrollEvent -> {
        tabla.refresh();

    });
    }


 private void agregarColumnas() {
    tabla.getColumns().clear();
    tabla.getColumns().addAll(columnaNombre,columnaTipo,columnaEliminar);
    tabla.addEventFilter(ScrollEvent.ANY, scrollEvent -> {
        tabla.refresh();

    });
}