How to cancel select processing in react?

Question

React

Not so long ago I began to study react, there is such a question, can someone tell me where you can read about it.

There is a Select component on which there is an onChange handler, when a value is selected, the data goes into the state and the page just becomes empty (as if a redirect is taking place)

How can I make onChange work, the data gets into the state, and nothing else happens.
(I use react-select)

Answer 1

This is not normal behavior. Look for errors, look for redirects, render conditions, etc.

Answer 2

Component code in studio