chore: add isValidElement for isFragment (#38056)

components/_util/reactNode.ts

@@ -3,7 +3,7 @@ import * as React from 'react';
 export const { isValidElement } = React;
 
 export function isFragment(child: React.ReactElement): boolean {
-  return child && child.type === React.Fragment;
+  return child && isValidElement(child) && child.type === React.Fragment;
 }
 
 type AnyObject = Record<PropertyKey, any>;