## React version
React version: 18.3.0-next-b0671f9ea-20230130

## Problem
In `StrictMode`,  when using hydrateRoot to render a component that using `useSyncExternalStore` it seems that useSES will do hydration twice. 

But in second hydration process,  useSES does not use the result of `getServerSnapshot` as initial state, which will cause hydration error.

This problem will only happen in `development` mode, 

## Reproduce
Link to code example:
https://codesandbox.io/s/useses-18-3-rojznv

It works well in react 18.2
https://codesandbox.io/s/useses-18-2-13iskc




const unsubscribe = subscribe(source._source, handleChange);
    if (__DEV__) {
      if (typeof unsubscribe !== 'function') {
        console.error(
          'Mutable source subscribe function must return an unsubscribe function.',
        );
      }
    }
    return unsubscribe;
  }, [source, subscribe]);
  
  
  
  
  
  
  
  
  
  
  
  if (
    !is(prevGetSnapshot, getSnapshot) ||
    !is(prevSource, source) ||
    !is(prevSubscribe, subscribe)
  ) {