问接触字段会导致react-hook-form变脏

EN

import React, { useState, useEffect } from "react";
import "./styles.css";
import { useForm } from "react-hook-form";
import { yupResolver } from "@hookform/resolvers/yup";
import * as yup from "yup";

export default function App() {
  interface MyObject {
    testing: string;
    id: number;
  }

  const blankObject: MyObject = {
    testing: "Default value",
    id: 0
  };

  const [obj, setObj] = useState(blankObject);

  const schema = yup.object().shape({
    testing: yup.string().max(40)
  });

  const { register, handleSubmit, formState, reset, errors } = useForm<
    MyObject
  >({
    resolver: yupResolver(schema),
    defaultValues: blankObject
  });

  useEffect(() => {
    setTimeout(() => {
      const newObj = {
        testing: "Pretend this came from the server",
        id: 123
      };
      setObj(newObj);
      reset(newObj);
    }, 2000);
  }, [reset]);

  const onSubmit = (data: MyObject) => {
    alert(JSON.stringify(data));
  };

  const onReset = () => {
    reset();
  };

  return (
    <form onSubmit={handleSubmit(onSubmit)}>
      {obj.id === 0 ? (
        <p>Please wait...</p>
      ) : (
        <div>
          <p>ID: {obj.id}</p>
          <label>Enter text: </label>
          <input
            type="text"
            name="testing"
            ref={register}
            autoComplete="off"
            style={{ width: "50%" }}
            defaultValue={obj.testing}
          />
          {errors.testing && (
            <div style={{ color: "#ff0000" }}>{errors.testing?.message}</div>
          )}

          <pre>{JSON.stringify(formState, null, 2)}</pre>

          <input type="submit" />
          <input type="button" value="reset" onClick={onReset} />
        </div>
      )}
    </form>
  );
}