2019 GENESIS G70 Forward Collision Avoidance Adaptive Cruise Control Problems

On numerous occasions, while driving with the adaptive cruise control on, at highway speeds, and no other vehicles near me, the system emits several beeps, shows that I'm close to a vehicle ahead of me (there isn't one), and initiates hard braking for maybe a couple of seconds. It is VERY disconcerting, and I haven't been able to find a common denominator for this issue, except that it seems to only happen during daylight hours, on sunny days. Should this happen while another car is following me, this could certainly cause an accident.

From six to ten times over the past year, while at highway speeds, the adaptive cruise control has suddenly sounded warning chimes and momentarily engaged emergency braking, when there is no other vehicle or object ahead of me. I have had the system suddenly brake from over 70mph down to between 50 and 55mph, then begin to accelerate again. This has always happened in good daylight and clear weather. Fortunately, it has not happened when I had a vehicle close following me. Recently this happened three times on a three hour highway trip, and once again the following morning, also on a highway. On 11/07/23 I took it to the Genesis dealer, but the technician was unable to reproduce the problem.