BeanFieldGroup not modified aufter TextField change

Hello,
I have a BeanFieldGroup that binds a BeanItem to a CustomComponent with a TextField.

import com.vaadin.ui.CustomComponent;
import com.vaadin.ui.TextField;
import com.vaadin.data.util.BeanItem;
import com.vaadin.event.FieldEvents.TextChangeEvent;

public class PriorityEditor extends CustomComponent {

    @PropertyId("severity")
    private TextField severityTextField = new TextField();
    private Button saveButton = new Button();
    private BeanFieldGroup<?> bindFieldsBuffered = new BeanFieldGroup<>(Priority.class);

    public void edit(BeanItem<Priority> priorityItem) {
        severityTextField.addTextChangeListener(this::textChange);
        bindFieldsBuffered.setBuffered(true);
        bindFieldsBuffered.setItemDataSource(priorityItem);
        bindFieldsBuffered.bindMemberFields(this);
    }

    private void textChange(TextChangeEvent event) {
        if (bindFieldsBuffered.isModified()) //is not modified
            saveButton.setEnabled(true);
        else
            saveButton.setEnabled(false);
    }
....
}

Now if I select my severityTextField and press a key on the keyboard I do get a TextChangeEvent but bindFieldsBuffered.isModified() returns false. Now if I put a second character I get a second TextChangeEvent and bindFieldsBuffered.isModified() returns true. However I'd like to get true the first time around. Is this a bug or should I use another listener?
 

Hi,

Have you tried to change your text field to immediate? 

severityTextField.setImmediate(true)

I tiried that, didn't help.

The value of the text field does not change when a character is typed in the text field. I think the value is set when the text field looses focus the bindFieldsBuffered returns isModified=true when the value of any field is changed.

Anyway I can get the new text that i typed with event.getText(). I'd find it better if I could decide if the typed text is set as value immediately or after focus out...

I didn't find any setter for other properties  that could influence thah behaviour.