Run this code, you see "blue" column without left border, if resize window - border come in sight
@Override public void start(Stage stage) {
        stage.setTitle("Bar Chart Sample");
        
        CategoryAxis cAxis = new CategoryAxis();
        NumberAxis nAxis = new NumberAxis(0, 5, 1);
        BarChart node = new BarChart(cAxis, nAxis);
        XYChart.Series series = new XYChart.Series();
        series.getData().add(new XYChart.Data("1", 2));
        XYChart.Series series1 = new XYChart.Series();
        series1.getData().add(new XYChart.Data("2", 3));
        XYChart.Series series2 = new XYChart.Series();
        series2.getData().add(new XYChart.Data("2", 5));
        node.getData().addAll(series, series1, series2);
        Scene scene = new Scene(node,500,500);
        
        stage.setScene(scene);
        stage.show();
    }