3MF project analysis flattened component meshes and lost which part and face each triangle came from, so independently configured parts could not be rebuilt after a subtraction.
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.