I have found that to force an Interior Elevation to read the zone, you need to manually edit the extents of the interior elevation. Stretch both ends of the interior elevation, so that it is completely inside the room, but not touching walls. Then stretch the ends back to where they were. Most of the time this will update the zone information it is pulling from.
If that doesn't work, try setting the Horizontal Range to Limited. The distance line you then get on the floor plan can be pulled back to the inside face of the wall, and now it should all be within the zone.
Margaret Cochran - BIM Manager,Technical Designer
ARCHICAD 7-23
HP ZBook 17, Windows 10