Version 73.0.3640.0 (Official Build) canary (64-bit)
Firmware version: Google_Cave.7820.384.0
Steps:
prerequisite: Make sure a braille display is already paired
# Load ChromeVox (Alt + CTRL + Z)
# Launch ChromeVox options (Search key + o, o)
# Navigate to the list of bluetooth braille displays. A paired display should be listed.
# Navigate to and activate the forget button
Expected: going back to the list of displays should not show anything
Actual: the list still shows the braille display

Reproduces in Canary