You are probably not waiting long enough.

Try again: a complete car shutdown with everything closed. Wait >60s. Or, wait >15min for the aux power to shutdown as well (orange light on transmission goes off)
Then, unlock the car wuith key or remote. Wait approx 15 to 30s to allow nav to boot to the point where it can display the splash screen.
You should see the splash screen

Maybe they changed the software interaction with the car for some models...??
There will be nothing you can do about it. So you need to accept it as it is.