diff --git a/banner.js b/banner.js
index fa09c10..aef0950 100644
--- a/banner.js
+++ b/banner.js
@@ -4,6 +4,7 @@
   // incrementversion DISMISSED_KEY
   const DISMISSED_KEY = 'jf-banner-dismissed-v1';
   const BANNER_ID = 'custom-announcement-banner';
+  const SCRIPT_START = Date.now();
 
   // Edit these to change banner content:
   const BANNER_HTML = `
@@ -100,7 +101,10 @@
       offsetElements.add(el);
     });
 
-    if (offsetPx > 0 && candidates.size === 0) {
+    // Jellyfin's SPA mounts its header asynchronously after DOMContentLoaded,
+    // so an empty result in the first few seconds is expected, not a bug.
+    // Only warn once things have had time to settle.
+    if (offsetPx > 0 && candidates.size === 0 && Date.now() - SCRIPT_START > 4000) {
       console.warn('[custom-banner] No fixed top navigation elements detected to push down; banner may overlap the menu.');
     }
   }