Problem exporting STEP file from CAD Assistant and importing same STEP file

Hi,

I have a problem exporting a STEP file from CAD Assistant and importing the same STEP file again (see screenshots).
The shape can somehow not be reconstructed from the STEP file.
The source is a BREP file which I open in CAD Assistant and then export as STEP file.
My guess is, it might be a problem with OCC STEP export.
Source BREP file and screenshots of the BREP file and STEP file opened in CAD Assistant are attached.

Cheers,
Tobi

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