Typescript fail with ThunkArg

[MrMamen]

The following wrapper code works in 2.6.0, but fails in 2.6.1

export type AppDispatch = typeof store.dispatch;
export const dispatchAndHandleResult = async <
  Returned, // The type of the return value of the thunk
  ThunkArg // The type of the argument the thunk receives
>(
  dispatch: AppDispatch,
  action: AsyncThunk<
    Returned,
    ThunkArg,
    { state: RootState; dispatch: AppDispatch; rejectValue: string }
  >,
  args: ThunkArg,
  onSuccess?: (result: Returned) => void,
  onFailure?: (error?: string) => void
) => {
  const actionResult = await dispatch(action(args));
  if (isFulfilled(actionResult)) {
    if (onSuccess) onSuccess(actionResult.payload);
  } else if (isRejected(actionResult)) {
    if (onFailure) onFailure(actionResult.payload);
  }
};

The reported problem from args in await dispatch(action(args));

TS2345: Argument of type 'ThunkArg' is not assignable to parameter of type 'ThunkArg & undefined'.
Type 'ThunkArg' is not assignable to type 'undefined'.

[EskiMojo14]

will be caused by #4860