TypeError: ComboBox with Tabs Vaadin 14.0.0.beta2

I’m using Vaadin 14.0.0.beta2 and I have a several tabs and a combobox on one tab. When I switch to another tab and then switch back to the tab that contains the combobox I get a (TypeError): $0.$connector is undefined and the combobox no longer works, that is I can’t click on it to see the values in it and make a selection. Below is the minimal code to reproduce the error:


import java.util.HashMap;
import java.util.Map;

import com.vaadin.flow.component.Component;
import com.vaadin.flow.component.combobox.ComboBox;
import com.vaadin.flow.component.html.Span;
import com.vaadin.flow.component.orderedlayout.VerticalLayout;
import com.vaadin.flow.component.page.Push;
import com.vaadin.flow.component.tabs.Tab;
import com.vaadin.flow.component.tabs.Tabs;
import com.vaadin.flow.router.Route;
@Push
@Route("test")
public class TestView extends VerticalLayout{

	
	private static final long serialVersionUID = 1L;

	private Tab tab1=new Tab("Tab 1");
	private Tab tab2=new Tab("Tab 2");
	private Tab tab3=new Tab("Tab 3");
	
	private Tabs tabs=new Tabs(tab1,tab2,tab3);
	private Map<Tab,Component> tabsToPages=new HashMap<>();
	private VerticalLayout content=new VerticalLayout();
	
	public TestView() {

		this.setSizeFull();
		this.content.setSizeFull();
		this.add(tabs,content);
		
		VerticalLayout vl1Content=new VerticalLayout();
		vl1Content.setSizeFull();
		ComboBox<String> comboBox=new ComboBox<>();
		comboBox.setItems("one","two","three","four");
		comboBox.setValue("one");
		vl1Content.add(comboBox);
		
		
		VerticalLayout vl2Content=new VerticalLayout();
		vl2Content.setSizeFull();
		vl2Content.add(new Span("Tab 2 content"));
		
		VerticalLayout vl3Content=new VerticalLayout();
		vl3Content.setSizeFull();
		vl3Content.add(new Span("Tab 3 content"));
		
		tabsToPages.put(tab1, vl1Content);
		tabsToPages.put(tab2, vl2Content);
		tabsToPages.put(tab3, vl3Content);
		
		content.add(vl1Content);
		tabs.addSelectedChangeListener(event -> {
			content.removeAll();
			content.add(tabsToPages.get(tabs.getSelectedTab()));

		});

	}

Any ideas as to how to fix this?

Thanks.

Hi!

This is a bug in ComboBox. Thanks for reporting it! We will fix the issue for the next release. https://github.com/vaadin/vaadin-combo-box-flow/issues/267