Viritin Problem: screen goes off

Hi 

My code:

public class tz1AbstractForm extends AbstractForm<ActorModel> {

    private static final long serialVersionUID = 1L;

    @PropertyId("name")
    private MTextField name = new MTextField("name");
    private TextField filter = new MTextField("filtro").withInputPrompt("filter...");
    private MButton save = new MButton("Salvar");
    
    private Tz1JPAContainer1<ActorModel> actor = new Tz1JPAContainer1<>(ActorModel.class);
    
    private MTable<ActorModel> list = new MTable<>(ActorModel.class)
            .withProperties("id", "name", "email")
            .withColumnHeaders("id", "Name", "Email")
            .setSortableProperties("name", "email")
            .withFullWidth()
            .setBeans(actor.dataSource().find(ActorModel.class,1)
            );

    public tz1AbstractForm() {
        list.addMValueChangeListener(new MValueChangeListener<ActorModel>() {
            
            /**
             * 
             */
            private static final long serialVersionUID = 1L;

            @Override
            public void valueChange(MValueChangeEvent<ActorModel> event) {
                setEntity(event.getValue());
            }
        });
    }

    /* (non-Javadoc)
     * @see org.vaadin.viritin.form.AbstractForm#createContent()
     */
    @Override
    protected Component createContent() {
          list.setCaption("Teste");
          list.setSelectable(true);
          return new MVerticalLayout(
                  filter,
                  list,
                  new MFormLayout(name),
                  save
                  ).withFullWidth().withFullHeight();
    }

}

In the first run, mText is filled with the contents of JTable. But the second time giving a click, the whole screen goes off and checked by debug that occurs on that line: CoyoteOutputStream.flush() line: 111.

But I do not have access. What could be wrong?First click in Mtable, ok, MTextField 

thanks