Hey all, I'm having some issues with caching. To my understanding, the following page should be cached and revalidate every hour (example taken from https://youtu.be/XBbXciVXWlQ?si=T5GIwVD0LzrwBsD9):

export default function Test() {
    function randomNumber() {
        return Math.floor(Math.random() * 1000);
    }
    return <div>
        {randomNumber()}
    </div>
}

This does not appear to be happening in the repo, and I get a new random number every time I refresh the page. Is there anything that might be the cause?