Missing loop when having a Limited Edition fabric for the middle panel, as shown in the Bag Builder?

Hello. Within the Bag Builder of a large laptop messenger, when you change the middle panel's material to a Limited Edition fabric, the loop on the lower front disappears, but it's there when you change it back to a normal color. Does this mean having a limited edition fabric for the middle panel will cause the bag to be missing that loop? And how tough are the limited edition fabrics, really? As tough as ballistic/cordura?