diff --git a/src/trx-client/trx-frontend/trx-frontend-http/assets/web/app.js b/src/trx-client/trx-frontend/trx-frontend-http/assets/web/app.js
index cfe931b..0d2c435 100644
--- a/src/trx-client/trx-frontend/trx-frontend-http/assets/web/app.js
+++ b/src/trx-client/trx-frontend/trx-frontend-http/assets/web/app.js
@@ -4766,6 +4766,10 @@ Object.defineProperties(window.trx, {
   locationSubtitle:          { get() { return locationSubtitle; } },
 });
 
+// Load plugin scripts now that window.trx is populated.  Dynamic scripts are
+// async so they must not be created before the namespace they depend on exists.
+if (typeof window.loadEagerPlugins === "function") window.loadEagerPlugins();
+
 // Start the app
 initializeApp();
 window.addEventListener("resize", resizeHeaderSignalCanvas);
diff --git a/src/trx-client/trx-frontend/trx-frontend-http/assets/web/index.html b/src/trx-client/trx-frontend/trx-frontend-http/assets/web/index.html
index 8e5a3e5..1fda642 100644
--- a/src/trx-client/trx-frontend/trx-frontend-http/assets/web/index.html
+++ b/src/trx-client/trx-frontend/trx-frontend-http/assets/web/index.html
@@ -1646,12 +1646,13 @@
       document.body.appendChild(s);
     });
   }
-  // Load core plugins immediately (needed on main tab).
-  // 'map-data' loads map-core.js + data handlers (ais/aprs/vdes/hf-aprs) eagerly
-  // so decode history replay can populate map data structures before the map
-  // tab is opened.  The 'loaded' Set prevents double-loading when the map tab
-  // is later activated.
-  ['digital-modes', 'map-data', 'bookmarks', 'settings'].forEach(loadPlugins);
+  // Eager plugin loading is triggered by app.js (after window.trx is set up)
+  // via window.loadEagerPlugins().  Dynamic scripts are effectively async, so
+  // loading them before app.js would cause map-core.js to crash when
+  // window.trx is not yet defined.
+  window.loadEagerPlugins = function() {
+    ['digital-modes', 'map-data', 'bookmarks', 'settings'].forEach(loadPlugins);
+  };
   // Load others on tab switch
   document.addEventListener('click', function(e) {
     var tab = e.target.closest('[data-tab]');