[StackedAreaChart] Display problem with StackedAreaChart when the axis is not displayed

Display problem with StackedAreaChart.
When the axis of origins is not displayed, display areas is not corect.

Finally is not work for Stacked area chart on Ensemble8.jar
http://imageshack.com/a/img820/4117/baxy.png
http://imageshack.com/a/img837/8034/d38e.png

package application;
import javafx.application.Application;
import javafx.collections.FXCollections;
import javafx.collections.ObservableList;
import javafx.scene.Parent;
import javafx.scene.Scene;
import javafx.scene.chart.StackedAreaChart;
import javafx.scene.chart.NumberAxis;
import javafx.stage.Stage;


/**
 * A sample that displays data in a stacked area chart.

 */
public class StackedAreaChartApp extends Application {

private StackedAreaChart chart;
private NumberAxis xAxis;
private NumberAxis yAxis;

public Parent createContent() {
xAxis = new NumberAxis("X Values", 1.0d, 9.0d, 2.0d);
//yAxis = new NumberAxis("Y Values", 0.0d, 30.0d, 2.0d); // this is work well
yAxis = new NumberAxis("Y Values", 1.0d, 30.0d, 2.0d); // this is work bad

ObservableList<StackedAreaChart.Series> areaChartData = FXCollections.observableArrayList(
new StackedAreaChart.Series("Series 1",FXCollections.observableArrayList(
new StackedAreaChart.Data(0,4),
new StackedAreaChart.Data(2,5),
new StackedAreaChart.Data(4,4),
new StackedAreaChart.Data(6,2),
new StackedAreaChart.Data(8,6),
new StackedAreaChart.Data(10,8)

)),
new StackedAreaChart.Series("Series 2", FXCollections.observableArrayList(
new StackedAreaChart.Data(0,8),
new StackedAreaChart.Data(2,2),
new StackedAreaChart.Data(4,9),
new StackedAreaChart.Data(6,7),
new StackedAreaChart.Data(8,5),
new StackedAreaChart.Data(10,7)
)),
new StackedAreaChart.Series("Series 3", FXCollections.observableArrayList(
new StackedAreaChart.Data(0,2),
new StackedAreaChart.Data(2,5),
new StackedAreaChart.Data(4,8),
new StackedAreaChart.Data(6,6),
new StackedAreaChart.Data(8,9),
new StackedAreaChart.Data(10,7)
))
);
chart = new StackedAreaChart(xAxis, yAxis, areaChartData);
return chart;
}


@Override public void start(Stage primaryStage) throws Exception {
primaryStage.setScene(new Scene(createContent()));
primaryStage.show();
}

/**
* Java main for when running without JavaFX launcher
*/
public static void main(String[] args) {
launch(args);
}

}

David Form France

Ps : Sorry for my english