[BRLTTY] Navigation Keys Stopped Working

[Rob]

Environment: Debian 9., Brltty 5.4 Handy Tech BasicBraille 40
I'm not sure what happened to cause it, but all of a sudden, my navigation keys on my display do not do anything. Brltty comes up, the cursor blinks, it responds to normal keyboard navigation. But when trying to move by Brltty navigagion such as left window, right window, up down, etc, nothing happens. What kind of thing could be suddenly causing this.