First let me say, I've never had that problem either, however, I've never used the cruise control in stop and go traffic or where the car would need to come to a complete stop. In fact, I didn't know our car had the ability to come to a complete stop since it does not have the emergency braking feature (which was available in 2014 on some vehicles - I owned a Jeep Grand Cherokee which had both functions...maybe MadMax meant in the Kia/Hyundai lineup).
Anyway, I wanted to comment that I actually hate the Kia auto cruise control system in my 14' Cadenza. Especially compared to the above mentioned Jeep system. The Jeep was so much smoother in handling approaching slower cars with the deceleration/acceleration actions. My Kia senses the upcoming car (icon in the dash) but actually waits so long to decelerate that it applies the brakes to match the new speed! And this happens even with a small difference in speeds, not just a large one. For instance say my cruise is set at 60 in a 55 and my car is approaching a car that is doing the posted 55, only 5 mph difference, my car will see that car far off, probably 15 secs or more the icon is lit, but it will wait until is just about on top of that car and then apply the brakes instead drifting and or decelerating and then braking if needed.
Full disclosure...our cars only rely on a camera based system for accuracy of this system whereas the Jeep system has a camera as well as Lidar in the front fascia. Still no excuse in my opinion.
If this is just my experience and you all have a different experience, please let me know so I can get mine recalibrated or something! Thanks!
2014 SXL, only mods are after market rims due to recall.