diff --git a/backend/main.py b/backend/main.py
index c3c8728..e37b793 100644
--- a/backend/main.py
+++ b/backend/main.py
@@ -406,7 +406,7 @@ async def serve_media(path: str, request: _Request):
         raise _HE(404, "Nicht gefunden.")
     return _media_response(filepath)
 
-APP_VER = "907"  # muss mit APP_VER in app.js übereinstimmen
+APP_VER = "908"  # muss mit APP_VER in app.js übereinstimmen
 
 @app.get("/.well-known/assetlinks.json")
 async def assetlinks():
diff --git a/backend/static/index.html b/backend/static/index.html
index 3d73a3b..cc1f098 100644
--- a/backend/static/index.html
+++ b/backend/static/index.html
@@ -591,10 +591,10 @@
 <div id="modal-container"></div>
 
 <!-- JS: Reihenfolge ist wichtig — erst Basis, dann Features -->
-<script src="/js/api.js?v=907"></script>
-<script src="/js/ui.js?v=907"></script>
-<script src="/js/app.js?v=907"></script>
-<script src="/js/worlds.js?v=907"></script>
+<script src="/js/api.js?v=908"></script>
+<script src="/js/ui.js?v=908"></script>
+<script src="/js/app.js?v=908"></script>
+<script src="/js/worlds.js?v=908"></script>
 
 <!-- Feature-Seiten werden lazy geladen -->
 
diff --git a/backend/static/js/app.js b/backend/static/js/app.js
index a8c359b..e3e08be 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     = '907'; // ← bei jedem Deploy mit Frontend-Änderungen erhöhen
+const APP_VER     = '908'; // ← bei jedem Deploy mit Frontend-Änderungen erhöhen
 const APP_VERSION = '1.5.1'; // ← 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/breeder.js b/backend/static/js/pages/breeder.js
index 705d484..58edb3d 100644
--- a/backend/static/js/pages/breeder.js
+++ b/backend/static/js/pages/breeder.js
@@ -28,22 +28,22 @@ window.Page_breeder = (() => {
     container.innerHTML = `
       <div id="breeder-profile-body" style="padding-bottom:calc(var(--space-16) + 24px)">
         ${UI.skeleton(5)}
-      </div>
-      <button id="breeder-back-fab" aria-label="Zurück zur Wurfbörse"
-              style="position:fixed;bottom:calc(var(--safe-bottom,0px) + 20px);right:20px;
-                     width:54px;height:54px;border-radius:50%;background:var(--c-primary);
-                     border:none;color:#fff;cursor:pointer;z-index:200;
-                     display:flex;align-items:center;justify-content:center;
-                     box-shadow:0 4px 18px rgba(196,132,58,.45);
-                     transition:transform .12s,box-shadow .12s;
-                     -webkit-tap-highlight-color:transparent">
-        <svg style="width:22px;height:22px" viewBox="0 0 256 256">
-          <use href="/icons/phosphor.svg#arrow-left"></use>
-        </svg>
-      </button>`;
+      </div>`;
 
-    document.getElementById('breeder-back-fab')
-      ?.addEventListener('click', () => App.navigate('wurfboerse'));
+    // FAB an document.body hängen damit position:fixed zuverlässig funktioniert
+    // und destroy() der einzige Lifecycle-Kontrollpunkt bleibt
+    const fab = document.createElement('button');
+    fab.id = 'breeder-back-fab';
+    fab.setAttribute('aria-label', 'Zurück zur Wurfbörse');
+    fab.style.cssText = 'position:fixed;bottom:calc(var(--safe-bottom,0px) + 20px);right:20px;' +
+      'width:54px;height:54px;border-radius:50%;background:var(--c-primary);' +
+      'border:none;color:#fff;cursor:pointer;z-index:200;' +
+      'display:flex;align-items:center;justify-content:center;' +
+      'box-shadow:0 4px 18px rgba(196,132,58,.45);transition:transform .12s,box-shadow .12s;' +
+      '-webkit-tap-highlight-color:transparent';
+    fab.innerHTML = '<svg style="width:22px;height:22px" viewBox="0 0 256 256"><use href="/icons/phosphor.svg#arrow-left"></use></svg>';
+    fab.addEventListener('click', () => App.navigate('wurfboerse'));
+    document.body.appendChild(fab);
 
     try {
       const p = await API.breeder.profile(zwingername);
diff --git a/backend/static/sw.js b/backend/static/sw.js
index 0ececf1..eea0518 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-v907';
+const CACHE_VERSION = 'by-v908';
 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