Menu2 from XML - problems with Rez and menu-item ids

Hi all.

I can't get past a problem with menu2 defined in XML: the ids of menu elements are apparently not assigned to menu entries. Since I have little experience with CIQ development, I might be doing something wrong.

I made a simple app which reproduces my problem out of a "widget" template and some sample code.

// app.mc
// This file was generated from "Widget" sample, except for row 21
using Toybox.Application;

class ciqtestmenu2App extends Application.AppBase {

    function initialize() {
        AppBase.initialize();
    }

    // onStart() is called on application start up
    function onStart(state) {
    }

    // onStop() is called when your application is exiting
    function onStop(state) {
    }

    // Return the initial view of your application here
    function getInitialView() {
        return [ new ciqtestmenu2View(), new ciqtestmenu2InitialDelegate() ]; //added a delegate here
    }

}

// initialDelegate.mc

using Toybox.System;
using Toybox.WatchUi;

class ciqtestmenu2InitialDelegate extends WatchUi.BehaviorDelegate
{
	function initialize()
	{
		BehaviorDelegate.initialize();
	}
	
	function onMenu()
	{
		// Next line of code was taken from 
		// https://developer.garmin.com/connect-iq/programmers-guide/user-interface#builtinhandlers 
		// example for menu (not menu2, because there is no example of how to push XML-defined menu2 view)
		WatchUi.pushView(new Rez.Menus.MainMenu(), new Menu2Delegate(), WatchUi.SLIDE_UP);
		return true;
	}

}

// initialView.mc
// This file was generated from "Widget" sample
using Toybox.WatchUi;

class ciqtestmenu2View extends WatchUi.View {

    function initialize() {
        View.initialize();
    }

    // Load your resources here
    function onLayout(dc) {
        setLayout(Rez.Layouts.MainLayout(dc));
    }

    // Called when this View is brought to the foreground. Restore
    // the state of this View and prepare it to be shown. This includes
    // loading resources into memory.
    function onShow() {
    }

    // Update the view
    function onUpdate(dc) {
        // Call the parent onUpdate function to redraw the layout
        View.onUpdate(dc);
    }

    // Called when this View is removed from the screen. Save the
    // state of this View here. This includes freeing resources from
    // memory.
    function onHide() {
    }

}

// menu2Delegate.mc
// This code is from Class: Toybox::WatchUi::Menu2InputDelegate API reference
using Toybox.WatchUi;
using Toybox.System;

class Menu2Delegate extends WatchUi.Menu2InputDelegate {
    function initialize() {
        Menu2InputDelegate.initialize();
    }

    function onSelect(item) {
        System.println(item.getId());
    }
}

I've created a folder "menus" inside existing "resources" folder and added the following XML file menu.xml (sample code from https://developer.garmin.com/connect-iq/programmers-guide/user-interface#menu2xmlresources)

<menu2 id="MainMenu" title="@Strings.MainMenuTitle">
    <menu-item id="generic1" label="Generic 1" subLabel="With Sublabel"></menu-item>
    <menu-item id="generic2" label="Generic 2"></menu-item>
</menu2>

Added a string to existing ./resources/strings.xml:

<strings>
    <string id="AppName">ciq-test-menu2</string>
    <string id="MainMenuTitle">Settings</string>
</strings>

I get these warnings during build time:

BUILD: WARNING: Rez:37: Unable to detect scope 'MenuItem' for the symbol 'initialize'.
BUILD: WARNING: Rez:38: Unable to detect scope 'MenuItem' for the symbol 'initialize'.

and the following console output after selecting (and pressing for confirmation) both menu2 entries in simulator:

symbol (21)
symbol (22)

The result I'm expecting should be something like "generic1" and "generic2" given the ids.

I'm using connectiq-sdk-lin-3.1.6-2019-10-23-2de4665c6 with Eclipse.