Comment by odysseus

The thing is, Kia does tell you what’s going on in some of their release notes, for example: https://owners.kia.com/us/en/ota-software-update-release-not...

However the very update that says it fixes the blank screen caused the blank screen to happen in the first place. (Never happened before that update.)

Then another silent update not listed on their site undoes that problem, but you have to wait a month or so to get it.