Adding a wall sweep in a later phase on an existing wall that is created on an earlier phase shows cutting the wall in the existing view. Whereas the part of the wall being removed SHOULD be shown as demolished in a demolition phased view. This obviously occurs when the sweep has the 'Cut Wall' option checked. But that's generally what needs to be done in some cases.
My workaround was to offset the sweep off the existing wall by 1mm and uncheck the 'Cut Wall' option.
This also did similar when setting an existing wall sweep on an existing wall to be demolished. The wall doesn't get infilled in the later phases and it doesn't like it if you try model and infill the gap!
This is quite a fundamental and basic issue.
