Saving invalidated only the ["accounts"] list, not the ["account", id] detail the editors read. Reopening rendered the stale cached detail, and the rich-text editor seeds its content only once on mount, so the refetch that followed never reached the screen. Both the signature and the account editors now write the PATCH response into the detail cache. Co-Authored-By: Claude Opus 5.5 <noreply@anthropic.com>