[TX135i]

OK, I searched but didn't find this question. Today I left my car running and in park as I ran to grab a newspaper. On the way out, I noticed that the tail lights appeared to be illuminated. (I leave the light switch in 'auto' mode all the time, and it was a bright, sunny morning.) So, I got home and checked various combinations of lights on and off but in no scenario with the car running and in park did the tail lights go out. Brake lights worked as they should, so it's just the tail lights in question. Is that normal? Do the tail lights 'go out' during daylight hours when the tranny is shifted into Drive? I have a 2012 135i BTW...