Revit linked model exported with section box is missing objects from curtain wall.

Open scene revit found here :
[Link Removed]

Notice that a section Box is applied in the 3d view (scene contains a linked File)
Export Using datasmith
Import inside Unreal.

Result--> Portions of the curtain wall glazing is missing entirely, and the pieces overlapping with the section box have the wrong dimensions.
The metadata for the mesh with the wrong dimensions contains the correct information as the model in Revit, including the correct height and width..

**Export the linked model without a section box for comparison and everything imports correctly as expected.

See Image attached.