after hiding all the tabs, I was able to return only one..
out of about 200

Don't even give this a try, you'll regret it

What is the message "All tabs hidden" for?
What a genius idea is to hid all tabs and about it to everybody. Haha

It's not restored when it have other open tabs.

It does not hide but closes all tabs

Cierra todas las pestañas y no las recupera. Es un botón de pánico sin más. Prácticamente como cerrar el navegador.