Is there any known flaw in the 2016 BMW 320i?

What is your question?

When I hit the breaks hard the car starts to decelerate fast but then it feels like the breaks disengage and I stop decelerating, it feels almost as if it kicks forward. I was just in an accident and I felt just that. My wife who was in the passenger seat asked me why I let go of the brakes, I told her I had not.

What makes this problem better or worse?

Nothing

How long has your 2016 BMW 320i had this problem?

Since the time I bought it, 6 months ago.