hi i am begginer in floor plan 3d i have two software floor plan3d vers 4.1 and floor plan 3d home & pro 16
i am building a house 3 stories high and adding stair see below in pro 16

and with help of floor plan 3d v4.1

why i didnt get a clear area over roof where stair end to go to next floor in pro 16 but get a clear access in floor plan 3d v4.1
kindly help