Create an existing plan with just walls, then set some of them to demolish in the new construction phase. Then go back and add in doors, and look at the new construction phase plan.
The doors do not pick up on the demolition of the wall in the new construction phase, they need to be demolished seperately.
Has this always been the case? I have never noticed it before, but maybe I've never done it that way before... Anyone else noticed this and/or know if it's intended?