diff --git a/backend/main.py b/backend/main.py
index 2a4beb4..624a637 100644
--- a/backend/main.py
+++ b/backend/main.py
@@ -410,7 +410,7 @@ async def serve_media(path: str, request: _Request):
         raise _HE(404, "Nicht gefunden.")
     return _media_response(filepath)
 
-APP_VER = "995"  # muss mit APP_VER in app.js übereinstimmen
+APP_VER = "996"  # muss mit APP_VER in app.js übereinstimmen
 
 @app.get("/.well-known/assetlinks.json")
 async def assetlinks():
diff --git a/backend/static/js/app.js b/backend/static/js/app.js
index 91ccd34..5e5a60e 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     = '995'; // ← bei jedem Deploy mit Frontend-Änderungen erhöhen
+const APP_VER     = '996'; // ← bei jedem Deploy mit Frontend-Änderungen erhöhen
 const APP_VERSION = '1.6.0'; // ← semantische Version, wird bei make release gesetzt
 const IS_STAGING  = location.hostname === 'staging.banyaro.app';
 // Cache-Bust-Parameter nach Update-Reload sofort entfernen
diff --git a/backend/static/js/pages/routes.js b/backend/static/js/pages/routes.js
index 7213da3..7ccce1a 100644
--- a/backend/static/js/pages/routes.js
+++ b/backend/static/js/pages/routes.js
@@ -821,7 +821,9 @@ window.Page_routes = (() => {
     btn.addEventListener('pointercancel', cancelHold);
     document.getElementById('rk-rec-stats-bar').style.display = '';
 
-    _recPolyline = L.polyline([], { color: '#ef4444', weight: 5, opacity: 0.9 }).addTo(_recMap);
+    if (_recMap && window.L) {
+      _recPolyline = L.polyline([], { color: '#ef4444', weight: 5, opacity: 0.9 }).addTo(_recMap);
+    }
 
     await _recAcquireWakeLock();
     document.addEventListener('visibilitychange', _recOnVisibility);
@@ -836,9 +838,9 @@ window.Page_routes = (() => {
         _recDistKm += d;
       }
       _recTrack.push({ lat, lon, ...(alt !== null ? { alt: Math.round(alt) } : {}) });
-      _recPolyline.addLatLng([lat, lon]);
-      _recLocMarker.setLatLng([lat, lon]);
-      if (_recTrack.length === 1) _recMap.setView([lat, lon], 16);
+      _recPolyline?.addLatLng([lat, lon]);
+      _recLocMarker?.setLatLng([lat, lon]);
+      if (_recTrack.length === 1) _recMap?.setView([lat, lon], 16);
       _updateRecStats();
     }, () => {}, { enableHighAccuracy: true, maximumAge: 2000 });
 
diff --git a/backend/static/sw.js b/backend/static/sw.js
index 599618d..99eb6dc 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-v995';
+const CACHE_VERSION = 'by-v996';
 const CACHE_STATIC  = `${CACHE_VERSION}-static`;
 const CACHE_TILES   = 'ban-yaro-tiles-v1';  // bleibt über SW-Updates erhalten
 const CACHE_API     = 'ban-yaro-api-v1';    // API-Response-Cache