Bug with types in source in spread operator

[mindyourlifeguide]

reproduce

type Events = {
  first_event: 'first_event',
  second_event: 'second_event',
}

type Pages = {
  first_page: 'first_page',
  second_page: 'second_page',
}

const $pages = createStore<Pages | null>(null);
const $events = createStore<Events | null>(null);
const $isClientStarted = createStore(false);

const clientStartEv = createEvent<{ events: Events; pages: Pages }>();

spread({
  source: clientStartEv,
  targets: { events: $events, pages: $pages }
});

No overload matches this call.
  Overload 1 of 2, '(config: { targets: { events?: Unit<Events | null> | undefined; pages?: Unit<Pages | null> | undefined; }; }): Event<Partial<{ events: Events | null; pages: Pages | null; }>>', gave the following error.
    Argument of type '{ source: Event<{ events: Events; pages: Pages; }>; targets: { events: Store<Events | null>; pages: Store<Pages | null>; }; }' is not assignable to parameter of type '{ targets: { events?: Unit<Events | null> | undefined; pages?: Unit<Pages | null> | undefined; }; }'.
      Object literal may only specify known properties, and 'source' does not exist in type '{ targets: { events?: Unit<Events | null> | undefined; pages?: Unit<Pages | null> | undefined; }; }'.