Retailer on non-active after disagreement with employer: Is eating a sandwich behind the screen or a break?

Does a sandwich eat behind your computer screen as a working time or break? A manager of a large store usually works during lunch. He therefore does not regularly set the time in which he eats a sandwich as a break in the systems of the store company. But his employer sees this as a fraud with the registration of his hours worked and puts him on non-active.

ttn-2