Don't know how to fix this.. Sorry!
I have a DishTV S7090 satellite box and I have experienced this problem on a couple of occasions. Strangely not all my series links have dropped off. Only programs that are on daily like The AM Show on TV3 and Breakfast on TV1 are the only ones to suffer. At least this happens rarely for me.
I just put it down to one more bug in the very buggy software that Dish TV can't or won't fix.