Has anyone ever had trouble with using or resurrecting the proper $ amount left on an Octopus card, after not using it for a year or something like that?

I visit HKG every year. Because I'm so worried that the left-over value may not reappear correctly after not using the card for a year, I always turn in my card at the end of the trip. But am I worrying about nothing? I'd rather not have to line up to get a card and to turn in the card and then lose 9HKD or whatever each trip.