SketchForge-3D (constructorfleet)MCADConfidence: Medium
ray-parity void building assumed any deeper shell sits inside a shallower one, so two overlapping un-unioned bodies produced a wrong solid that was stored and carried into STEP.
From the Grok pain-radar digest, Oct 25-26 2026 (Oct 25 daytime to Oct 26 morning slots). Verified live 2026-10-26: issue/PR read on GitHub; title and state confirmed.