Layers do not appear in the Layers Panel
More specifics please. A screenshot or something to help us help you.
Suddenly working the way it is supposed to - You are good luck!
Och! It was probably just the way you were holding your tongue.
Layers Panel has a few known bugs. Take a look at the later / further developed version (commercial) thereof, Layers Organizer, I have not had instability issues / bugs with that one.
I have the same problem.:confuso: