Removing ground level floors seems to be buggy. I can remove the floor, but it doesn't actually remove the floor, but it...does. Light still passes through as though it were not there. The attached video shows me removing the floor around a staircase. The stairs don't get deleted and the light from above can be seen in the basement which is an enclosed room with no lights. The basement room's ceiling has been removed, but that's immaterial because it does it either way.
PlayStation 5.
Game version 2.11.
Expansions and kits: Backyard Stuff, Cats & Dogs, Get Together, My First Pet Stuff, Little Campers Kit, Castle Estate Kit, Vampires.