I can see my state has updated in redux but retrieving it with useSelector gives old value

It is exactly as the title says. I know this is a popular problem, but none of the solutions i have seen have worked for me.

My reducer

export const productDetailsSLice = createSlice({
  name: "productDetails",
  initialState: {
    product: {},
    error: null,
    loading: false,
  },
  reducers: {
    getProductDetail(state, action) {
      // Object.assign(state, action.payload);
      state.loading = action.payload.loading;
      state.product = action.payload.product;
      state.error = action.payload.error;
    },
  },
});

My action

export const productDetailAction = async (dispatch, productDetail, id) => {
  dispatch(
    getProductDetail({
      loading: true,
      product: {},
      error: null,
    })
  );

  await fetch(`/api/products/${id}`, {
    method: "GET",
    headers: {},
  })
    .then((response) => {
      if (!response.ok) {
        return response.json().then((data) => {});
      } else {
        return response.json().then((data) => {
          dispatch(
            getProductDetail({
              loading: false,
              product: data,
              error: null,
            })
          );
        });
      }
    })
    .catch((error) => {
      dispatch(
        getProductDetail({
          loading: false,
          product: productDetail.product,
          error:
            error.response && error.response.data.detail
              ? error.response.data.detail
              : error.message,
        })
      );
    });
};

My component

 const productDetails = useSelector((state) => state.productDetails);
  const { error, loading, product } = productDetails;

  useEffect(() => {
    if (!product.name || product._id !== Number(productId)) {
      productDetailAction(dispatch, productDetails, productId);
    }
  }, [product]);

when i console.log(product) it is undefined but i can see that my API call was sent successfully and indeed my redux state has changed. retrieving the new value is the problem. Please help!! stuck on this for a long time now. Thank you