diff --git a/web/default/src/main.tsx b/web/default/src/main.tsx
index 31d25295..cd420d83 100644
--- a/web/default/src/main.tsx
+++ b/web/default/src/main.tsx
@@ -63,7 +63,8 @@ const queryClient = new QueryClient({
           [401, 403].includes(error.response?.status ?? 0)
         )
       },
-      refetchOnWindowFocus: import.meta.env.PROD,
+      // Keep focused tabs from silently re-running heavy pages like logs.
+      refetchOnWindowFocus: false,
       staleTime: 10 * 1000, // 10s
     },
     mutations: {