diff --git a/CHANGELOG.md b/CHANGELOG.md
index 7e9a7d89..421d91fe 100644
--- a/CHANGELOG.md
+++ b/CHANGELOG.md
@@ -3,6 +3,12 @@
 
 ## [Unreleased]
 
+## [v0.51.643] — 2026-06-25 — Release WX (unassigned tasks show up on the mobile Kanban board)
+
+### Fixed
+
+- **On the mobile Kanban board, tasks with no assignee are no longer invisible.** Mobile groups tasks into per-profile lanes, but the lane key was derived from a localized "unassigned" label, so tasks without an assignee had no stable lane and silently dropped off the board (the CLI would show, e.g., Ready = 3 while mobile showed Ready = 0). Unassigned tasks now group into a stable internal lane rendered as an explicit "unassigned" lane (sorted after the named profiles), so the mobile counts match the CLI. Thanks @rodboev. (#4853)
+
 ## [v0.51.642] — 2026-06-25 — Release WW (a failed steer now shows why, with Retry / Dismiss)
 
 ### Fixed