UserAgent: Mozilla/5.0 (Windows NT 6.1; Win64; x64) AppleWebKit/537.36 (KHTML, like Gecko) Chrome/64.0.3282.119 Safari/537.36

Steps to reproduce the problem:
1. go to ARIA Authoring practices Editor Menubar Example: http://w3c.github.io/aria-practices/examples/menubar/menubar-2/menubar-2.html
2. start up a screen reader (note: I tested this on Windows with both JAWS and NVDA - not sure of Mac/VO behavior)
3. navigate to the menubar (i.e. type the tab key until the "Font" menubar item has focus
4. listen to the screen reader output - it says something like "Font menu 1 of 1"
5. Use the right/left arrow keys to navigate through the menus, and you will still hear "1 of 1" for all menubar items.

What is the expected behavior?
The expected behavior is to hear something like "Font menu 1 of 4". If I run the same test using the same screen readers on Firefox and IE, I do hear the expected "1 of 4", "2 of 4", "3 of 4", "4 of 4" values as I use the right/left arrow keys across the menubar items.

What went wrong?
This is a problem for screen reader users because they will think that there is only one menu. They won't know to use right/left arrows to navigate to the other menus.

Did this work before? No 

Chrome version: 64.0.3282.119  Channel: stable
OS Version: 6.1 (Windows 7, Windows Server 2008 R2)
Flash Version: Shockwave Flash 28.0 r0