With the IFC2x3 export using the Coordination  and Steel Fabrication model viewview that is represented in the modeling mode

Model view is available also in the drawing mode and it is represented in its own window.

definition, the beams and columns that have a fittingadjustment of a part end

plane at both ends are shorter than in the model. The error does not occur when line cuts are used instead or only one fitting is used.  This has now been fixed.