Why duplicate api requests in react SPA?

Question

React

The project uses react SPA, redux, react-router, connected-react-router.
In the middleware, fetch requests are dispatched by '@@router/LOCATION_CHANGE'.
There is data that is always used when the site is first loaded.
For some reason requests occur several times.
Does anyone have any thoughts on this?

Answer 1

just a guess
in the latest versions of create-react-app some React.StrictMode was added that makes the first render twice, that's probably because of this double render and fetch data twice, see how to remove it
https://stackoverflow.com/a /61897567