Nissan Frontier Cruise Control

My 2012 Nissan 4-cyl Frontier’s Cruise Control has a lag in reestablishing set speed after descending a hill. Set Speed drops off and continues dropping for 4-5 seconds as the speed drops ~5mph, then corrects itself and accelerates to the preset speed as if I’ve engaged RESUME from PAUSE. Dealer’s Tech tells me there is nothing he can find wrong but he’ll check bulletins…of course, it’s still under warranty. Anybody else have this experience? Root Cause/Fix?