Version 71.0.3578.8 (Official Build) dev (64-bit)
Firmware version: Google_Cave.7820.384.0
Steps:
# Launch ChromeVox (Alt + CTRL + Z)
# navigate to status tray (alt + shift + S)
# navigate to and activate lock screen button
# use search +left/right arrows to explore lock  screen
Expected: ChromeVox announces all elements on lock screen such as status tray, shelf and password field
Actual: ChromeVox loops between shelf, shut down and sign out buttons bypassing password field
Reproduces in Dev
workaround: tab to navigate to password field