Once a month or so, while driving my 2017 Ioniq, I experience a strange issue where the RPM suddenly jumps to around 3,500, hitting the red line. I have a 6-speed automatic transmission, and it’s unsettling because no warning lights come on during this spike. It lasts for about a minute before everything returns to normal, as if nothing happened. I’ve tried to pay attention to the conditions when it occurs, but it’s puzzling. I’m starting to wonder if it’s a transmission issue or something else entirely.