This is the same thing that was reported as problem #2, from New Market, MD, USA. Except for the mileage, the problem was the same. It's at the dealer today to see if they can fix it. They seemed to be aware of it happening on other Sorentos. So, to save typing, I will include the other fellow's description:

Intermittent problem with advanced smart cruise control and autonomous braking on a new 2017 Kia Sorento with less than (7,000) miles. What happened: When using the advanced smart control feature, the smart cruise control will shut down randomly. On (two) occasions, while driving with smart cruise control, on a highway on a clear day, my Kia's dashboard lit up with "check smart cruise control system." These additional warning lights lit up on the dashboard: Anti-lock brake warning light, electronic brake force distribution system warning light, master warning light, and electronic stability control indicator light. The cruise control will not work and all lights stay on until the vehicle is turned off and then back on.