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Ok i have re-engineered the example.osm of Air Wall Zone Mixing Building Component Library, by opening it in OS and export the IDF. Furthermore opening and checking IDF code with the needed code, for more purist energy modelers who rely on IDFs scripts.
Again, the same issue, if you export that model.osm to idf you will see the specified interzone surface is the same as above.
So the takeaway is that something is wrong with that solution, because it will generate an opaque surface. If it not can you explain only with IDF code what classes are missing, if no reply i'm sure my assumption is right and will hack those values which seem opposite to what a neutral interzone surface should be.
The interzone surface:

BuildingSurface:Detailed,
  Surface 2,                              !- Name
  Wall,                                   !- Surface Type
  Air Wall,                               !- Construction Name
  Thermal Zone: Space 101,                !- Zone Name
  Surface,                                !- Outside Boundary Condition
  Surface 21,                             !- Outside Boundary Condition Object
  NoSun,                                  !- Sun Exposure
  NoWind,                                 !- Wind Exposure
  ,                                       !- View Factor to Ground
  ,                                       !- Number of Vertices
  24.384, 0, 3.048,                       !- X,Y,Z Vertex 1 {m}
  24.384, 0, 0,                           !- X,Y,Z Vertex 2 {m}
  0, 0, 0,                                !- X,Y,Z Vertex 3 {m}
  0, 0, 3.048;                            !- X,Y,Z Vertex 4 {m}

the construction:

Construction,
  Air Wall,                               !- Name
  Air Wall Material;                      !- Layer 1

the material:

Material,
  Air Wall Material,                      !- Name
  MediumSmooth,                           !- Roughness
  0.01,                                   !- Thickness {m}
  0.6,                                    !- Conductivity {W/m-K}
  800,                                    !- Density {kg/m3}
  1000,                                   !- Specific Heat {J/kg-K}
  0.95,                                   !- Thermal Absorptance
  0.7,                                    !- Solar Absorptance
  0.7;                                    !- Visible Absorptance

Ok i have re-engineered the example.osm of Air Wall Zone Mixing Building Component Library, by opening it in OS and export the IDF. Furthermore opening and checking IDF code with the needed code, for more purist energy modelers who rely on IDFs scripts.
Again, the same issue, if you export that model.osm to idf you will see the specified interzone surface is the same as above.
So the takeaway is that something is wrong with that solution, because it will generate an opaque surface. If it not can you explain only with IDF code what classes are missing, if no reply i'm sure my assumption is right ok and will hack those values which seem opposite to what a neutral interzone surface should be.
The interzone surface:

BuildingSurface:Detailed,
  Surface 2,                              !- Name
  Wall,                                   !- Surface Type
  Air Wall,                               !- Construction Name
  Thermal Zone: Space 101,                !- Zone Name
  Surface,                                !- Outside Boundary Condition
  Surface 21,                             !- Outside Boundary Condition Object
  NoSun,                                  !- Sun Exposure
  NoWind,                                 !- Wind Exposure
  ,                                       !- View Factor to Ground
  ,                                       !- Number of Vertices
  24.384, 0, 3.048,                       !- X,Y,Z Vertex 1 {m}
  24.384, 0, 0,                           !- X,Y,Z Vertex 2 {m}
  0, 0, 0,                                !- X,Y,Z Vertex 3 {m}
  0, 0, 3.048;                            !- X,Y,Z Vertex 4 {m}

the construction:

Construction,
  Air Wall,                               !- Name
  Air Wall Material;                      !- Layer 1

the material:

Material,
  Air Wall Material,                      !- Name
  MediumSmooth,                           !- Roughness
  0.01,                                   !- Thickness {m}
  0.6,                                    !- Conductivity {W/m-K}
  800,                                    !- Density {kg/m3}
  1000,                                   !- Specific Heat {J/kg-K}
  0.95,                                   !- Thermal Absorptance
  0.7,                                    !- Solar Absorptance
  0.7;                                    !- Visible Absorptance