Remove React.Strict mode

ui/src/index.js

@@ -4,12 +4,7 @@ import './index.css'
 import App from './App'
 import * as serviceWorker from './serviceWorker'
 
-ReactDOM.render(
-  <React.StrictMode>
-    <App />
-  </React.StrictMode>,
-  document.getElementById('root')
-)
+ReactDOM.render(<App />, document.getElementById('root'))
 
 // If you want your app to work offline and load faster, you can change
 // unregister() to register() below. Note this comes with some pitfalls.