SDK 4.1.1. menu interactivity results in anonymous error

As per forum thread: Is there a bug with latest SDK simulator and menus? - Discussion - Connect IQ - Garmin Forums

STEPS TO REPLICATE:

1. Compile an app with a Toybox.WatchUi.Menu for Venu 2s using the latest SDK (4.1.1).

2. Open the menu eg: something like:

   function onMenu() {
	  WatchUi.pushView(new Rez.Menus.MainMenu(), new ACHMenuDelegate(), WatchUi.SLIDE_DOWN);
	  return true;
    }

3. Try to select the second item in the menu by touching the screen and swiping...

EXPECTED RESULTS:

The second menu item should come into focus...

ACTUAL RESULTS:

An anonymous error as per the below...

Error: Symbol Not Found Error
Details: Failed invoking <symbol>
Stack: 

ADDITIONAL

If I use the keyboard (up / down arrows etc) to move the menu, I can use all menu items by clicking on the screen without any error.

I can also access the menu item by simply tapping on it.

It is only when I swipe that I see the anonymous error, but I always see the anonymous error if I swipe.