diff --git a/docs/web-ui/dashboard.md b/docs/web-ui/dashboard.md
index 6ccca5a0..ea025855 100644
--- a/docs/web-ui/dashboard.md
+++ b/docs/web-ui/dashboard.md
@@ -129,8 +129,11 @@ chip (`manual | meta_update | auto_update | crash_recover | approval`
 optional reason / error. Meta-update cascade rebuilds nest under
 their parent entry (`parent_id` grouping; `rqe-child` CSS class).
 Dedup: re-enqueueing a still-queued op for the same agent
-collapses into the existing entry. Running entries tick elapsed
-seconds live, and when the worker has annotated the current phase
+collapses into the existing entry. All timing labels stay live:
+running entries tick elapsed seconds every second; queued and
+terminal ("done N ago" / "failed N ago") labels tick every 30s so
+keyed rows never show stale timestamps as they persist across
+`rebuild_queue_changed` snapshots. When the worker has annotated the current phase
 a cyan `↳ <step>` sub-line appears under the main row showing the
 in-flight step name (e.g. `↳ meta prepare_deploy` → `↳ nixos-container update`
 → `↳ finalize deploy`). Terminal transitions clear `step` on the