Time-specific front page preview no longer working?

Hello,

I noticed this two days ago and it still seems to be an issue. I would typically rely on the time-specific front page preview to ensure all the right stories load into the top stories section in the right order and everything is okay with the teaser images. However, now it is only showing stuff that has already been published.

I tried clearing the cache for the past day, restarting my laptop, trying Microsoft Edge instead of Chrome, but nothing has fixed this. Is there some way to correct this issue? Perhaps it's just an issue for me, because I don't know of anyone else experiencing this...