Pressing f5 not refreshing the screen

I have a mobile app which uses vaadin touchkit

On my UI class I have the refresh method and has @PreserveOnRefresh annotation. When I run the debugger when pressing f5 on MyWorkView  it comes to the refresh method . It shows that the this -> MyWorkView but doesnt update?

    @Override
    protected void refresh(VaadinRequest request) {
        this.getContent().markAsDirty();
    }

this - MyWorkView (the screen I want to  refresh) 

what do you want to update? markAsDirty() is just a method for the framework to check if the component hierarchy has changed; it does not call any of your own methods. In more than 99% of cases you do not need to call markAsDirty().