TabSet.setCanCloseTabs and Tab.setIcon conflict

[Hirn]

if I set setCanCloseTabs(true) for TabSet, then the icons for Tab disappear

public class TestBug implements EntryPoint {

    public void onModuleLoad() {
        TabSet templatesTabSet = new TabSet();
        templatesTabSet.setTabBarPosition(Side.TOP);
        templatesTabSet.setWidth("100%");
        templatesTabSet.setHeight("*");
        templatesTabSet.setCanCloseTabs(true);

        String[] titles = new String[] {"tab 1", "tab 2", "tab 3"};
        for(String title:titles) {
                Tab tab = new Tab(title, "[SKINIMG]Dialog/say.png");
                tab.setPaneMargin(0);
                templatesTabSet.addTab(tab);
        }

        templatesTabSet.draw();
   }
}

SmartClient Ajax RIA system
Version v12.1p_2023-05-19/Pro Deployment (2023-05-19)