Vehicle Bright During Day with no line of sight

I have a vehicle that has roofs on every tile that isn’t windows, and closed curtains on every window and door, and I cannot see outside of it, everything outside is sepia toned as not seen. However, the interior of my vehicle is still lit up. Pretty sure that’s not supposed to happen?

Indeed. I can confirm this for experimental build 0.E-10923.
Dome lights are off. Built a car with boards all around me and roof on every tile. The tile I was standing on was a driver seat but was eventually turned into an aisle.

I guess this might originate from the same place as the “reaching through the floor board to pick up items underneath your car”.
PS: Having an atomic lamp (or I guess any light emitting object) under your car does also light up the car interior.