diff --git a/lib/screens/home_shell.dart b/lib/screens/home_shell.dart
index 1a0590e..e833375 100644
--- a/lib/screens/home_shell.dart
+++ b/lib/screens/home_shell.dart
@@ -15,6 +15,8 @@ class _HomeShellState extends State<HomeShell> {
   int _currentIndex = 0;
   final _collectionsKey = GlobalKey<CollectionsScreenState>();
   final _scanKey = GlobalKey<ScanTabState>();
+  final Map<int, DateTime> _lastRefreshed = {};
+  static const _refreshDebounce = Duration(seconds: 30);
 
   late final List<Widget> _pages = <Widget>[
     CollectionsScreen(key: _collectionsKey),
@@ -24,10 +26,13 @@ class _HomeShellState extends State<HomeShell> {
 
   void _onTabSelected(int i) {
     setState(() => _currentIndex = i);
+    final now = DateTime.now();
+    final last = _lastRefreshed[i];
+    if (last != null && now.difference(last) < _refreshDebounce) return;
+    _lastRefreshed[i] = now;
     if (i == 0) {
       _collectionsKey.currentState?.refresh();
-    }
-    if (i == 1) {
+    } else if (i == 1) {
       _scanKey.currentState?.refresh();
     }
   }