diff --git a/server/src/wled_controller/static/js/core/ui.js b/server/src/wled_controller/static/js/core/ui.js
index d9dd07a..89fb656 100644
--- a/server/src/wled_controller/static/js/core/ui.js
+++ b/server/src/wled_controller/static/js/core/ui.js
@@ -293,10 +293,21 @@ export function hideOverlaySpinner() {
     if (overlay) overlay.remove();
 }
 
-/** Toggle the thin loading bar on a tab panel during data refresh. */
+/** Toggle the thin loading bar on a tab panel during data refresh.
+ *  Delays showing the bar by 400ms so quick loads never flash it. */
+const _refreshTimers = {};
 export function setTabRefreshing(containerId, refreshing) {
     const panel = document.getElementById(containerId)?.closest('.tab-panel');
-    if (panel) panel.classList.toggle('refreshing', refreshing);
+    if (!panel) return;
+    if (refreshing) {
+        _refreshTimers[containerId] = setTimeout(() => {
+            panel.classList.add('refreshing');
+        }, 400);
+    } else {
+        clearTimeout(_refreshTimers[containerId]);
+        delete _refreshTimers[containerId];
+        panel.classList.remove('refreshing');
+    }
 }
 
 export function formatUptime(seconds) {