It's got to be a switch you haven't noticed yet, or one that appears to be for something else. On our Landmark, the switch for that light is labeled "Aisle". If it's ON, the light stays on. If it's OFF, our Welcome Back controller will turn it on when the entry door is opened. Then after about 1 minute it goes off. But again, if the Aisle light switch is ON, the welcome back is bypassed.So I think there's probably a switch you haven't found. On Monday, call Heartland Customer Service at 877-262-8032 / 574-262-8030. Have your VIN # ready. They should be able to contact the Pioneer manufacturing team to find out where that switch is located.