A Gridfinity bin built in Fusion 360 and imported as STEP split into three with two pieces moved together, and the Join then computed forever and never finished, with no command error recorded.
From the Grok pain-radar digests, Oct 27-28 2026 (Oct 27 8:41 AM ET through Oct 28 7:41 AM ET digests plus the Haitch editions). Verified live 2026-10-28: issue/PR/thread read; title and state confirmed.