Version 69.0.3497.35 (Official Build) dev (64-bit)
Firmware version:
Google_Cave.7820.384.0

Steps:
# Launch Chrome Vox
# open access and control menu (Alt+F)
# use arrow keys to move through the menu until you find a submenu such as more tools, or help
Expected: ChromeVox announces menu item followed by an indication of a submenu
Actual: ChromeVox announces menu item with no indication it has a submenu
Reproduces in Dev