If you do this, the vehicle somehow assumes it's still on and once you put it in "Park" and get off, the music and the AC vents will continue to run, discharging your battery. The worse part is, if you walk away and return after a few minutes, the car will be locked and you key remote will not unlock it. The only way around is to open the back door and let yourself in.
Have you seen this? I have reported this to Kia and have not heard back yet
I tried this this morning, turned the engine off in Drive, then shifted to park and low and behold, similar problem! I didn't go to the extent of locking myself out but I can reproduce something similar.
Normally, if I have the radio on and turn off the engine the infotainment system will stay ON until I open the door. Once I open the door, all accessories turn off.
When I turn off the engine in DRIVE and then shift to PARK, the radio & infotainment system stays on, even if I open the door. This will likely lead to the bug you saw. Another difference, the little key fob light comes. Gotta search for what that means but I'm guessing it doesn't detect my key fob. To clear both problems I just restart the engine in PARK.
This is not a concern for me because I am conditioned to not do this through decades of driving, but nonetheless, it appears to be a bug that is reproducible.
If everyone doesn't have this bug, may be it's some timer setting you and I have in common or affect a specific trim level. I have an EX, what trim do you have?.