In a Revit MCP bridge, two agents in two Revit windows share one active-instance.json file, so when one pins its window the other's next call goes to the wrong project, with no error either way.
From the Grok pain-radar digests, Nov 1-2 2026 (Nov 1 8:41 AM ET through Nov 2 7:41 AM ET digests plus the Haitch editions). Verified live 2026-11-02: issue/PR read; title and state confirmed.