Yes don't they also pulse the brake lights or did I imagine reading that somewhere....I think its a bit of a standard with these systems? They pulse the brake lights as whilst braking and then turn on the hazards when you stop...I certainly did not know about the flashing brake lights bit until recently but its useful to know if you see it in front of you!!!!!Just had to do an emergency stop and the hazard warning lights came on automatically. What a great car this is.
I have done what I thought were hard braking in my Golf, but a few weeks ago I literally stood hard on the brake at 60-70 and it kicked in. I think the systems all work on a certain rate of deceleration and also it works at higher speeds. Probably a similar process on the Ioniq.I never noticed that! And I've done tons of emergency breaking haha