Using JavaBeanXXProperty will not update the model

[devent]

Hello. I used the JavaBeanDoubleProperty, JavaBeanStringProperty, etc. in my model, but the form is not updating the fields if changed in the GUI.

        p = new ObservableGameMainPaneProperties.GameMainPaneProperties();
        np = new ObservableGameMainPaneProperties(p);
        this.form = Form.of(Group.of(//
                Field.ofStringType(np.kernelName).label("Name").required("Not empty"), //
                Field.ofIntegerType(np.seed).label("Seed").required("Not empty"), //
                Field.ofIntegerType(np.width).label("Width").required("Not empty"), //
                Field.ofIntegerType(np.height).label("Height").required("Not empty"), //
                Field.ofDoubleType(np.z).label("Z").required("Not empty"), //
                Field.ofIntegerType(np.dim).label("Dimension").required("Not empty") //
        ));

I created a demo project https://github.com/devent/formsfx-javabeanproperty-test
You have to change the field "Dimension" to "4". I expect that if I do that then the field ObservableGameMainPaneProperties#GameMainPaneProperties#dim is also set to 4.