Please note. This problem is not present even under iOS 16.0 unless running a firmware version older than 2.1 of the braille display. In cases like the Humanware NLS E-Reader where there is currently no version 2.1, this problem still persists as outlined below.
These commands no longer work. For Brailliant and Chameleon users, a firmware update to version 2.1 will address this bug. it is not available to the NLS E-Reader devices though which are also produced by Humanware.