Headlights remain on

Has anyone else experienced this? Twice now my headlights have not “defaulted to automatic” and have remained on after I shut off the vehicle and exit. I’m not talking about the courtesy exterior lighting for a brief period, I’m talking about the actual headlights. I had a waitress come to me in a restaurant last week to tell me she thought I’d left the lights on in my truck. I never even touch the light control knob on the dash (unless I possibly brush against it wiping off the dashboard) and the owner’s manual seems clear that the headlights default to auto every time you start the truck, so I’m baffled.