diff --git a/app/static/js/services/nativeBridgeService.js b/app/static/js/services/nativeBridgeService.js
index 968ff05..474fa7c 100644
--- a/app/static/js/services/nativeBridgeService.js
+++ b/app/static/js/services/nativeBridgeService.js
@@ -17,8 +17,13 @@
     /** D10: UI subscribes to bridge connection changes. cb({connected}) or null to clear. */
     onStatusChange: function (cb) { this._statusCb = cb; },
     _notifyStatus: function (connected) {
-      this.isBridgeConnected = !!connected;
-      if (this._statusCb) this._statusCb({ connected: !!connected });
+      connected = !!connected;
+      // Loop guard (V45.7): poller queryStatus moi 400ms tung goi cb du connected
+      // khong doi -> App reset map + reload toan bo track -> mark loading lai ->
+      // poller lai thay loading -> LOAD skip vo han. Chi fire khi TRANG THAI DOI.
+      if (this.isBridgeConnected === connected) return;
+      this.isBridgeConnected = connected;
+      if (this._statusCb) this._statusCb({ connected: connected });
     },
 
     /** Fix C: re-establish bridge routing once audio frames arrive again
diff --git a/app/templates/index.html b/app/templates/index.html
index 130c83f..2b34d77 100644
--- a/app/templates/index.html
+++ b/app/templates/index.html
@@ -39,7 +39,7 @@
     <script src="/static/js/services/storage.js?v=202608290945"></script>
     <script src="/static/js/services/soundfontStorage.js?v=202608290945"></script>
     <script src="/static/js/services/soundfontPlayer.js?v=202608290945"></script>
-    <script src="/static/js/services/nativeBridgeService.js?v=202608290945"></script>
+    <script src="/static/js/services/nativeBridgeService.js?v=202608291510"></script>
     <script src="/static/js/services/bridgeAudioNode.js?v=202608290945"></script>
     <script src="/static/js/services/unifiedMidiRouter.js?v=202608290945"></script>
     <script src="/static/js/services/audioRoutingEngine.js?v=202608290945"></script>