For a couple of days we live with our new family member. The guy cleaned the house a few times and we dearly love him. Map saving is active and the map looks pretty accurate. I selected a few rooms and combined them and named them. However there are a few areas which appear grey and I can't select them (to combine them) but I could "Pin n Go" him and he will do the cleaning.
It is suggested to do a full cleaning again: Start from the dock and clean your whole rooms, then back to recharge on its own. So that grey areas will be relearned.