diff --git a/containers/120-mule-images.md b/containers/120-mule-images.md
index 554695e..4830f4c 100644
--- a/containers/120-mule-images.md
+++ b/containers/120-mule-images.md
@@ -80,6 +80,12 @@ For pushes from inside the LXC, gitea creds at `/etc/mule-deploy/git-credentials
 
 ## Changelog
 
+### 2026-05-10 — Timeline scroll-anchor on section switch
+
+Clicking a folder in the left sidebar (or any other navigation that changed `currentSection` — All Photos, Rated, Discarded, etc.) didn't reset the timeline's scroll position. If the user was deep in All Photos and clicked a folder with fewer rows, the new section loaded with the previous scroll offset preserved, often landing on empty space below the last row.
+
+`Timeline.tsx` already had a section-change effect that cleared selection and reset the auto-focus guard, and a separate auto-focus effect that selects `photos[0]` once the new query resolves. The latter has an "ensure visible" scrollTo, but it only fires if the cell is out of view AND only after the next render — by then the user has already seen the wrong scroll position. Added `parentRef.current.scrollTop = 0` synchronously inside the section-change effect so the first paint of the new section anchors at the top; the auto-focus selectPhoto then highlights photo[0] as before.
+
 ### 2026-05-10 — Filter bar 422-on-date-from
 
 User reported "all filters broken, no photos shown" right after the metadata-extraction overhaul shipped. Tracing actual API traffic on a fresh session showed `GET /api/v1/photos?per_page=100&date_from=2026-04-10&sort=taken_at&order=desc` returning **422 Unprocessable Entity**: pydantic v2's `datetime` parser rejects bare-date strings (`"2026-04-10"`) for `Optional[datetime]` query params.