How you’re doing it is not the way it’s supposed to work. Switch clicked to the left is lights manually on, an override if you will for all interior lights. If it is clicked to the right, the lights will not illuminate when doors are opened. If the switch is flat that is the default position and allows automatic lighting of the cabin when you open a door. You might want to ask your dealer to look into that. I do not recommend leaving the lights constantly on until the BMS times them out.
Summary: the switch is a three position rocker and the middle position is the automatic function.