I wonder if it's the blind spot monitoring radar? My first Kona was a 2018 Trend, and almost every time I drove out on the highway, the amber triangle would appear in my dash. It would sometimes go out on its own, but usually required an engine shutoff and restart. Never happened with my N-line, nor N models. The tech said he the had heard other Kona owners complain of the same issue. Assuming that Hyundai fixed this issue after 5 years, but no idea beyond that...