computed property always empty string

Model.ts

export interface Model {
  router?: Reducer<any>;
  routing: {
    push: Thunk<Model, string>;
    currentBoard: Computed<any>;
  };
  data: Data;
  ui: Ui;
};

const {
  createReduxHistory,
  routerMiddleware,
  routerReducer,
} = createReduxHistoryContext({
  history: createBrowserHistory(),
  reduxTravelling: true,
});

const model: Model = {
  router: reducer(routerReducer),
  routing: {
    push: thunk((actions, payload, { dispatch }) => dispatch(push(payload))),
    currentBoard: computed(state => {
      return state.router ? state.router.location.pathname : '';
    }),
  },
  data,
  ui,
};

export default createStore(model, {middleware: [routerMiddleware]});