Real world bug modifying reference argument in a function

loader.js

import { init } from "@rematch/core"

import * as models from "./models"
import * as reducers from "./reducers"
import { syncInitialStatePlugin } from "./plugins"

function initStore(initialStateModel ,initialStateRedux) { 
  store = init({
    models: models,
    plugins: [syncInitialStatePlugin(initialStateModel)],
    redux: {
      initialStateRedux,
      middlewares: [thunkMiddleware],
      reducers: reducers,
    },
  })
}

plugin.js

export const syncInitialStatePlugin = (state = {}) => ({
  init: () => ({
    onModel(model) {
      model.state = state[model.name]
    },
  }),
})