Faces bounded by a single vertex (closed spheres, cone tips, the way Parasolid writes them) do not import. The reporter's bearings exported from Onshape came in with no balls, with no error; the faces are just gone.
From the Grok pain-radar digests, Oct 28-29 2026 (Oct 28 8:41 AM ET through Oct 29 early-morning Haitch editions). Verified live 2026-10-29: issue/PR read; title and state confirmed.