Fix childer tennats

frontend/src/api/hooks/useControlPanelData.ts

@@ -20,6 +20,10 @@ import { parseISO } from 'date-fns';
 // Debounce delay for SSE-triggered query invalidations (ms)
 const SSE_INVALIDATION_DEBOUNCE_MS = 500;
 
+// Delay before SSE invalidations are allowed after initial load (ms)
+// This prevents duplicate API calls when SSE events arrive during/right after initial fetch
+const SSE_INITIAL_LOAD_GRACE_PERIOD_MS = 3000;
+
 // ============================================================
 // Types
 // ============================================================
@@ -421,6 +425,15 @@ export function useControlPanelData(tenantId: string) {
   // Ref for debouncing SSE-triggered invalidations
   const invalidationTimeoutRef = useRef<NodeJS.Timeout | null>(null);
   const lastEventCountRef = useRef<number>(0);
+  // Track when the initial data was successfully fetched to avoid immediate SSE refetches
+  const initialLoadTimestampRef = useRef<number | null>(null);
+
+  // Update initial load timestamp when query succeeds
+  useEffect(() => {
+    if (query.isSuccess && !initialLoadTimestampRef.current) {
+      initialLoadTimestampRef.current = Date.now();
+    }
+  }, [query.isSuccess]);
 
   // SSE integration - invalidate query on relevant events (debounced)
   useEffect(() => {
@@ -429,6 +442,17 @@ export function useControlPanelData(tenantId: string) {
       return;
     }
 
+    // OPTIMIZATION: Skip SSE-triggered invalidation during grace period after initial load
+    // This prevents duplicate API calls when SSE events arrive during/right after the initial fetch
+    if (initialLoadTimestampRef.current) {
+      const timeSinceInitialLoad = Date.now() - initialLoadTimestampRef.current;
+      if (timeSinceInitialLoad < SSE_INITIAL_LOAD_GRACE_PERIOD_MS) {
+        // Update the event count ref so we don't process these events later
+        lastEventCountRef.current = sseAlerts.length;
+        return;
+      }
+    }
+
     const relevantEvents = sseAlerts.filter(event =>
       event.event_type?.includes('production.') ||
       event.event_type?.includes('batch_') ||