If the target sheet could not be opened, the open step gave up silently and an ERC quick fix placed a no-connect on whatever sheet was active. A rectangle edit also collapsed shapes to zero height, and sheets in subfolders were registered by bare file name.
From the Grok pain-radar digests, Oct 26-27 2026 (Oct 26 12:41 PM ET through Oct 27 7:41 AM ET digests plus the Haitch editions). Verified live 2026-10-27: issue/PR/thread read; title and state confirmed.