Use cache

src/components/main/Root.tsx

@@ -50,7 +50,7 @@ const Navigation = function ({ router }) {
           const id = route.id;
           const className = id === activeRouteId ? "font-bold" : "";
           return (
-            <li className={className}>
+            <li className={className} key={id}>
               <button onClick={() => onUpdateRoute(route.path)}>{id}</button>
             </li>
           );