diff --git a/src/Client.js b/src/Client.js
index 77f05f2..48ed38d 100644
--- a/src/Client.js
+++ b/src/Client.js
@@ -277,7 +277,7 @@ class Client extends EventEmitter {
         });
 
         await page.evaluate(() => {
-            window.Store.Msg.on('add', window.onAddMessageEvent);
+            window.Store.Msg.on('add', (msg) => { if(msg.isNewMsg) window.onAddMessageEvent(msg);});
             window.Store.Msg.on('change', window.onChangeMessageEvent);
             window.Store.Msg.on('change:type', window.onChangeMessageTypeEvent);
             window.Store.Msg.on('change:ack', window.onMessageAckEvent);