diff --git a/.openclaw-sync/source.json b/.openclaw-sync/source.json
index 65d21f6dc..2c1719237 100644
--- a/.openclaw-sync/source.json
+++ b/.openclaw-sync/source.json
@@ -1,5 +1,5 @@
 {
   "repository": "openclaw/openclaw",
-  "sha": "0c46e8000e2b1d32d0d28c1fa63e25f09190a48f",
-  "syncedAt": "2026-04-24T22:56:25.348Z"
+  "sha": "893a18ff5cdc2be9a2f1bfe75880fa2ae11f40cc",
+  "syncedAt": "2026-04-24T23:01:12.358Z"
 }
diff --git a/docs/channels/slack.md b/docs/channels/slack.md
index 35ec94e0e..3470fe87c 100644
--- a/docs/channels/slack.md
+++ b/docs/channels/slack.md
@@ -826,6 +826,9 @@ openclaw doctor
     - `channels.slack.dm.enabled`
     - `channels.slack.dmPolicy` (or legacy `channels.slack.dm.policy`)
     - pairing approvals / allowlist entries
+    - Slack Assistant DM events: verbose logs mentioning `drop message_changed`
+      usually mean Slack sent an edited Assistant-thread event without a
+      recoverable human sender in message metadata
 
 ```bash
 openclaw pairing list slack