Interior lighting while driving

So last night as I was driving home, i noticed that the light at the bottom of the passenger door was on and remained on the whole time until I got out of my car and locked it. ( I was driving alone). I hadn't noticed this before and wondering if its normal.

Is it normal? Yes - and - No. You should use your iDrive. Go to: Menu > Settings > Environment > Lighting > Door Lighting > Footlights > Owner's Manual > Return From Owner's Manual then > Bluetooth > Bluetooth Settings > (sorry) | Lighting Choices > Lone Driver > Profile > "Keep Lamps On" and see if that option is already checked.