Having an issue with builders work holes and sill heights in Revit MEP, and not sure if we're just missing something simple.

A builders work hole in an extrusion wall, if you change the reference level, it stays in place and only the sill height changes. Yet if we change the reference level of BW holes in any of the internal walls, the hole actually moves to that level instead of simply updating the sill height.

What are we missing as it's the same BW hole family, only difference we can see is the wall type?