Just happened to me again, script stopped doing anyhing just after 20minutes. Sometimes it just goes on for 6 hours straight and sometimes it just stops and the pause/stop button doesn't work and i can't even close the client without opening task manager.
EDIT: Also a suggestion, would be better when banking the script would eat to full hp instead of taking 10 food from bank, eating 1 to get health above the scale to eat and then grabbing x amount of food you have set it to get.