Alright, I payed very little attention to this until this morning when I experienced it, and boy is it scary...
I've had the car since early 2017 and have never had this happen on the street or on the track until today. My guess is that I usually try to keep a lot of space between myself and the car ahead of me on the freeway or the street, so I never have had the need to "panic brake" at speed. Could be due to my history or riding motorcycles and having a habit of "looking ahead" to predict what's going to happen in front of me. I have had to panic brake a handful of times, but I was going quite slowly (backing out of driveway, parking lot speeds, etc), so the affects might not be very evident.
This morning, I was cruising along the freeway going 70 mph. I briefly look down to my SYNC screen running Android Auto to change the podcast I was listening to, and was abruptly greeted by a trucks brake lights in front of me when I looked back up. I quickly stomped on the brakes as a reflex and the car nosed down so quickly I had to consciously pull my foot away from the brake pedal to regain control. I also caught a glimpse of the headlights of the Dodge truck following me get very uncomfortably close to my rear on the rear view mirror.
At the track, I don't usually brake quickly either. I try to brake late, but from all the driving training I've done, I've been taught to keep all my inputs applied gradually to make transitions as smooth as possible as not to shock the system. I'm still not that great with late braking, but when I do, I do brake hard but push down gradually, so I'm guessing the brakes aren't applied quick enough to be interpreted by the car to be a panic brake situation.
Even though it did what it was supposed to do, I think its still a safety risk for some who expect the car to behave a certain way.
Was there a new calibration available to fix this issue? I vaguely recall reading something about it either here or on FB but have not found anything come up on my Ford Owners site.