diff --git a/AppImage/components/health-status-modal.tsx b/AppImage/components/health-status-modal.tsx
index d4b9a64a..d189d3e9 100644
--- a/AppImage/components/health-status-modal.tsx
+++ b/AppImage/components/health-status-modal.tsx
@@ -151,9 +151,21 @@ export function HealthStatusModal({ open, onOpenChange, getApiUrl }: HealthStatu
     }
   }, [getApiUrl])
 
+  // Tick counter to force re-render every 30s so "X minutes ago" stays current
+  const [, setTick] = useState(0)
+  
+  useEffect(() => {
+    if (!open) return
+    const tickInterval = setInterval(() => setTick(t => t + 1), 30000)
+    return () => clearInterval(tickInterval)
+  }, [open])
+
   useEffect(() => {
     if (open) {
       fetchHealthDetails()
+      // Auto-refresh every 5 minutes while modal is open
+      const refreshInterval = setInterval(fetchHealthDetails, 300000)
+      return () => clearInterval(refreshInterval)
     }
   }, [open])
 
diff --git a/AppImage/scripts/flask_health_routes.py b/AppImage/scripts/flask_health_routes.py
index 14c5df26..5113daf2 100644
--- a/AppImage/scripts/flask_health_routes.py
+++ b/AppImage/scripts/flask_health_routes.py
@@ -149,10 +149,23 @@ def get_dismissed_errors():
 def get_full_health():
     """
     Get complete health data in a single request: detailed status + active errors + dismissed.
-    Reduces frontend round-trips.
+    Uses background-cached results if fresh (< 6 min) for instant response,
+    otherwise runs a fresh check.
     """
+    import time as _time
     try:
-        details = health_monitor.get_detailed_status()
+        # Try to use the background-cached detailed result for instant response
+        bg_key = '_bg_detailed'
+        bg_last = health_monitor.last_check_times.get(bg_key, 0)
+        bg_age = _time.time() - bg_last
+        
+        if bg_age < 360 and bg_key in health_monitor.cached_results:
+            # Use cached result (at most ~5 min old)
+            details = health_monitor.cached_results[bg_key]
+        else:
+            # No fresh cache, run live (first load or cache expired)
+            details = health_monitor.get_detailed_status()
+        
         active_errors = health_persistence.get_active_errors()
         dismissed = health_persistence.get_dismissed_errors()
         custom_suppressions = health_persistence.get_custom_suppressions()
diff --git a/AppImage/scripts/flask_server.py b/AppImage/scripts/flask_server.py
index 85c58b4a..23103b1e 100644
--- a/AppImage/scripts/flask_server.py
+++ b/AppImage/scripts/flask_server.py
@@ -590,7 +590,10 @@ def _health_collector_loop():
                 'status': overall,
                 'summary': summary
             }
+            # Cache the full detailed result so the modal can return it instantly
+            health_monitor.cached_results['_bg_detailed'] = result
             health_monitor.last_check_times['_bg_overall'] = time.time()
+            health_monitor.last_check_times['_bg_detailed'] = time.time()
         except Exception as e:
             print(f"[ProxMenux] Health collector error: {e}")