PnPJs SPFx orderBy() not working?

const [trainingPages, setPages] = useState<ISomeModel[]>([]);

//* Omitted for abbreviation */

const spCache = spfi(_sp).using(Caching({ store: "session" }))
const sortField: string = "TrainingAreaPosition";
const sortAsc: boolean = true;

const response: ISomeModelResponse[] = await spCache.web.lists
                    .getByTitle(LIBRARY_NAME)
                    .items.select("Id", "Title", "TrainingArea", "TrainingPageActive", "TrainingAreaPosition", "FileLeafRef")
                    .filter("TrainingPageActive eq 1")
                    .orderBy(sortField, sortAsc)
                    ();

const items: ISomeModel[] = response.map((item: ISomeModelResponse) => {
    return {
        Id: item.Id,
        Title: item.Title,
        TrainingArea: item.TrainingArea,
        Active: item.TrainingPageActive,
        Position: item.TrainingAreaPosition,
        Name: item.FileLeafRef

    };
});

const byPosition = items.slice(0);
byPosition.sort(function (a, b) {
    return a.Position - b.Position;
});

setPages(byPosition);

//* Omitted for abbreviation */

    return [trainingPages, isError] as const
};

export default useTrainingPages