It probably gets reset when it loses wall power. My TV resets some of the settings every time, I have to go back and edit it - it's very annoying. Sony Bravia.
Yeah, that'd be my guess too. Either that or an update.
Regardless it's convenient that it forgets my tracking preferences, defaults to the most permissive options possible, and doesn't forget all my other settings.
Of only the humanity could invent something what could store the settings even in absrnse of power. Maybe it could be called like a non-volatile random acess memory, or something like that.