There could be a safety issue here.
Picture this scenario (it's actually what I go through on my trips to Blackpool):
Travelling West on the M55 I set the speed limiter to 54mph as I enter the temporary maximum speed limit through the roadworks. After 3 miles at the conclusion of said roadworks I substitute the speed limiter for adaptive cruise, by switching to cruise... hitting the set button... auto-advance the speed in 5mph increments by holding the + button, then release that button when 75mph is showing. Gradually my car reaches 75mph.
If I were not to be shown those increments being added to the target speed, or indeed any target speed being shown, I may accidentally set the target to 85/90 mph and that would not look good to the Highways Agency vehicle right behind me.
I'd let Kia know that they've possibly compromised your safety with a recent OTA update. I didn't use the word upgrade as that doesn't sound particularly descriptive.