diff --git a/.openclaw-sync/source.json b/.openclaw-sync/source.json
index 99181a3a9..f376aa112 100644
--- a/.openclaw-sync/source.json
+++ b/.openclaw-sync/source.json
@@ -1,5 +1,5 @@
 {
   "repository": "openclaw/openclaw",
-  "sha": "9089e6b595ba33b4afc27b99c56ace80c4fbbc7b",
-  "syncedAt": "2026-04-26T12:00:20.400Z"
+  "sha": "e672b61417af5c45b0431df6d9109a1f4b618ef5",
+  "syncedAt": "2026-04-26T16:52:37.407Z"
 }
diff --git a/docs/channels/whatsapp.md b/docs/channels/whatsapp.md
index 13092af45..194f15b1e 100644
--- a/docs/channels/whatsapp.md
+++ b/docs/channels/whatsapp.md
@@ -146,6 +146,7 @@ OpenClaw recommends running WhatsApp on a separate number when possible. (The ch
 ## Runtime model
 
 - Gateway owns the WhatsApp socket and reconnect loop.
+- The reconnect watchdog uses WhatsApp Web transport activity, not only inbound app-message volume, so a quiet linked-device session is not restarted solely because nobody has sent a message recently. A longer application-silence cap still forces a reconnect if transport frames keep arriving but no application messages are handled for the watchdog window.
 - Outbound sends require an active WhatsApp listener for the target account.
 - Status and broadcast chats are ignored (`@status`, `@broadcast`).
 - Direct chats use DM session rules (`session.dmScope`; default `main` collapses DMs to the agent main session).
@@ -510,6 +511,10 @@ Behavior notes:
   <Accordion title="Linked but disconnected / reconnect loop">
     Symptom: linked account with repeated disconnects or reconnect attempts.
 
+    Quiet accounts can stay connected past the normal message timeout; the watchdog
+    restarts when WhatsApp Web transport activity stops, the socket closes, or
+    application-level activity stays silent beyond the longer safety window.
+
     Fix:
 
     ```bash