I had not tried to convert and use a recent version of FC.
Yes, when I try to convert I see the same errors. My guess is that an "old-style" tool is used, and the conversion function does not handle old tools properly. (Not sure that it is worth the effort to further complicate the conversion. Backward compatibility need go only so far.)
The original conclusion still applies. I do not believe there is any problem in FreeCAD that results in the photo shown in the first post.
Gene