diff --git a/containers/libreportal/frontend/components/apps/overview/js/overview-manager.js b/containers/libreportal/frontend/components/apps/overview/js/overview-manager.js
index 6901295..794aba7 100644
--- a/containers/libreportal/frontend/components/apps/overview/js/overview-manager.js
+++ b/containers/libreportal/frontend/components/apps/overview/js/overview-manager.js
@@ -359,7 +359,9 @@ class OverviewManager {
   // configuration sections (its sidebar restyled as a nested tab strip). On a
   // revisit we refresh rather than re-mount, to keep its sub-tab + expand state.
   mountBackupCenter(pane) {
-    if (document.getElementById('backup-section') && window.overviewBackupPage) {
+    // Detect a prior mount by the embedded fragment in THIS pane — not by
+    // #backup-section, which the per-app Backups tab also defines.
+    if (pane.querySelector('.backup-layout') && window.overviewBackupPage) {
       try { window.overviewBackupPage.refreshAll().then(() => window.overviewBackupPage.render()).catch(() => {}); } catch (_) {}
       return;
     }