Why reducer function return only proxy? redux/toolkit

问题

My reducer function in state parameter (payload) returns the only proxy:

Proxy {i: 0, A: {…}, P: false, I: false, D: {…}, …}
[[Handler]]: null
[[Target]]: null
[[IsRevoked]]: true

My slice where is state proxy:

import { createSlice } from "@reduxjs/toolkit";

export const userSlice = createSlice({
  name: "user",
  initialState: {
    currentUser: {
      loggined: false,
      isAdmin: false,
      jwt: false,
    },
  },
  reducers: {
    setUser: (state, payload) => {
      console.log(state); // here is problem, but payload works very well
    },
    clearUser: (state) => {},
  },
});
export const { setUser, clearUser } = userSlice.actions;

export const currentUser = (state) => state.user.currentUser;

export default userSlice.reducer;

here is redux store

import { configureStore } from "@reduxjs/toolkit";
import userReducer from "../features/user/userSlice";

export default configureStore({
  reducer: {
    user: userReducer,
  },
});

来源：https://stackoverflow.com/questions/65764486/why-reducer-function-return-only-proxy-redux-toolkit