STEP-import of DEGENERATE_TOROIDAL_SURFACE can be misinterpreted.

In certain cases the Shape generated by importing a degenerate toroidal surface from STEP can be wrong, which creates downstream-problems

I can reproducibly generate the problem by drawing a bowl-like shape in CAD ( in my case onShape), revolving the curve around an axis and export it to STEP. This step file I import using a modified version (attached) of the sample glfw-program distributed with OCCT.

Depending on how the toroid is cut, and on the particulars of its degeneracy, the interpreted shape is wrong.
N.b. if the toroid minor center of rotation is to the left of the axis of revolution (toroid major center of rotation), and the shape is cut by a plane above the midplane of the toroid (the minor rot. center is below), the Shape gets wrong, in all other cases I've found it is correct. See attached report Attachment 1 (PDF)