I've been an active reader on HN for over 12 years and I have _never_ seen a comment displayed as [delayed] even once. Not on the site nor any of the third part

I've been an active reader on HN for over 12 years and I have _never_ seen a comment displayed as [delayed] even once. Not on the site nor any of the third party mobile apps, and I've tried a lot of them. Weird.