diff --git a/backend/static/js/app.js b/backend/static/js/app.js
index 9837de2..d7a0b32 100644
--- a/backend/static/js/app.js
+++ b/backend/static/js/app.js
@@ -3,7 +3,7 @@
    Router, State-Management, Navigation, Initialisierung.
    ============================================================ */
 
-const APP_VER = '385'; // ← bei jedem Deploy mit Frontend-Änderungen erhöhen
+const APP_VER = '386'; // ← bei jedem Deploy mit Frontend-Änderungen erhöhen
 
 const App = (() => {
 
diff --git a/backend/static/js/pages/map.js b/backend/static/js/pages/map.js
index 3c5fad5..67b6e5a 100644
--- a/backend/static/js/pages/map.js
+++ b/backend/static/js/pages/map.js
@@ -286,33 +286,35 @@ window.Page_map = (() => {
   // Leaflet + MarkerCluster laden
   // ----------------------------------------------------------
   async function _loadLeaflet() {
-    if (_leafletLoaded || window.L) { _leafletLoaded = true; return; }
+    if (_leafletLoaded) return;
 
-    // Leaflet CSS
-    const lCss = document.createElement('link');
-    lCss.rel = 'stylesheet'; lCss.href = '/css/leaflet.css';
-    document.head.appendChild(lCss);
+    // Leaflet-Basis: nur laden wenn noch nicht vorhanden (diary.js kann es vorgeladen haben)
+    if (!window.L) {
+      const lCss = document.createElement('link');
+      lCss.rel = 'stylesheet'; lCss.href = '/css/leaflet.css';
+      document.head.appendChild(lCss);
 
-    // Leaflet JS
-    await new Promise(resolve => {
-      const s = document.createElement('script');
-      s.src = '/js/leaflet.js'; s.onload = resolve;
-      document.head.appendChild(s);
-    });
+      await new Promise(resolve => {
+        const s = document.createElement('script');
+        s.src = '/js/leaflet.js'; s.onload = resolve;
+        document.head.appendChild(s);
+      });
+    }
 
-    // MarkerCluster CSS
-    ['MarkerCluster.css', 'MarkerCluster.Default.css'].forEach(f => {
-      const l = document.createElement('link');
-      l.rel = 'stylesheet'; l.href = `/css/${f}`;
-      document.head.appendChild(l);
-    });
+    // MarkerCluster: separat prüfen — diary.js lädt Leaflet ohne MarkerCluster
+    if (!window.L.markerClusterGroup) {
+      ['MarkerCluster.css', 'MarkerCluster.Default.css'].forEach(f => {
+        const l = document.createElement('link');
+        l.rel = 'stylesheet'; l.href = `/css/${f}`;
+        document.head.appendChild(l);
+      });
 
-    // MarkerCluster JS
-    await new Promise(resolve => {
-      const s = document.createElement('script');
-      s.src = '/js/leaflet.markercluster.js'; s.onload = resolve;
-      document.head.appendChild(s);
-    });
+      await new Promise(resolve => {
+        const s = document.createElement('script');
+        s.src = '/js/leaflet.markercluster.js'; s.onload = resolve;
+        document.head.appendChild(s);
+      });
+    }
 
     _leafletLoaded = true;
   }
diff --git a/backend/static/sw.js b/backend/static/sw.js
index 836ef26..ca5421c 100644
--- a/backend/static/sw.js
+++ b/backend/static/sw.js
@@ -3,7 +3,7 @@
    Offline-Cache + Push Notifications + Tile-Cache
    ============================================================ */
 
-const CACHE_VERSION = 'by-v405';
+const CACHE_VERSION = 'by-v406';
 const CACHE_STATIC  = `${CACHE_VERSION}-static`;
 const CACHE_TILES   = 'ban-yaro-tiles-v1';  // bleibt über SW-Updates erhalten