Upvoting a comment does not change order of comments?

When I upvote a comment under a post it does not change the position of the comment, i.e. the sorting of the comments. Why is that?

Example: https://www.indiehackers.com/post/new-to-indie-hackers-any-tips-585f04425c

I would expect this to work like reddit. Top voted comments at the top, downvoted comments at the bottom.