diff --git a/.openclaw-sync/source.json b/.openclaw-sync/source.json
index de4e44c69..cb527166b 100644
--- a/.openclaw-sync/source.json
+++ b/.openclaw-sync/source.json
@@ -1,5 +1,5 @@
 {
   "repository": "openclaw/openclaw",
-  "sha": "5394efe71ff9a7c1f417b617c17fab5ba7442a0d",
-  "syncedAt": "2026-04-24T22:19:37.894Z"
+  "sha": "5c445f784227b582c5cf407db5a24766f63b774d",
+  "syncedAt": "2026-04-24T22:35:05.578Z"
 }
diff --git a/docs/concepts/streaming.md b/docs/concepts/streaming.md
index 1d00311b6..1317dd7ee 100644
--- a/docs/concepts/streaming.md
+++ b/docs/concepts/streaming.md
@@ -156,6 +156,7 @@ Slack:
 - `partial` can use Slack native streaming (`chat.startStream`/`append`/`stop`) when available.
 - `block` uses append-style draft previews.
 - `progress` uses status preview text, then final answer.
+- Native and draft preview streaming suppress block replies for that turn, so a Slack reply is streamed by one delivery path only.
 - Final media/error payloads and progress finals do not create throwaway draft messages; only text/block finals that can edit the preview flush pending draft text.
 
 Mattermost: