"All channels hidden, press * then select 'Manage channels'."
Naturally, pressing * does absolutely NOTHING - otherwise I wouldn't be posting here.
What kind of fresh **bleep** is this???
Roku TV 8522X
Software version 10.5.0 built 4201-AN
Had same problem, lost all channels trying to use the favorites, to shorten scanning. Go to settings and find FACTORY RESET. This solved mine, but now i have to start over finding the other channels i put in myself.