Does it remove it and redirect? If not, you're fine. I think that's why something like this is chosen. Your (server) app will rightly ignore that query parameter, but you'll probably still serve up the page. React is client-side, so it will still see it in the url. Everyone should be happy.

Agreed. There should be a function u can call in the console as a fallback similar to Perfect.start(). I bet there is, they just didn't publicize it.