Hunger level

Hunger bar doesn't go down on Normal lev of difficulty. When changing lev.of difficulty to Hard and saving, after quitting game and coming back to it ,level of difficulty changed itself to Normal and hunger still doesn't work. Once for a while after fiddling with levels of difficulty hunger starts dropping down but after quitting the game and restarting it, everything is broken again...

Similar bug posted few times in the past but marked as resolved for some reason.....