[useImmerReducer] reducer gets called twice on the initial dispatch - a bug?

[github0013]

import React from "react"
import { useImmerReducer } from "use-immer"

const initialState = { count: 0 }

function reducer(draft, action) {
  console.log(action.type) // --- here

  switch (action.type) {
    case "reset":
      return initialState
    case "increment":
      return void draft.count++
    case "decrement":
      return void draft.count--
  }
}

function Counter() {
  const [state, dispatch] = useImmerReducer(reducer, initialState)
  return (
    <>
      Count: {state.count}
      <button onClick={() => dispatch({ type: "reset" })}>Reset</button>
      <button onClick={() => dispatch({ type: "increment" })}>+</button>
      <button onClick={() => dispatch({ type: "decrement" })}>-</button>
    </>
  )
}

This is the example code, and I just added console.log line before the switch.
If you click on any of the buttons on this example page, you will see the initial dispatch is run twice.

But it doesn't run twice again after the initial dispatch, and it logs just once. Is the initial twice call how it's supposed to be?