Google confirmed the news that it is experiencing index issues of new articles in “Top Stories.”
We had an indexing issue with new articles appearing in Top Stories beginning around 3pm PT. We've now fixed this, though full restoration will likely take several hours, maybe less. We'll update when that's reached.
— Google SearchLiaison (@searchliaison) September 12, 2020
The issue appeared initially on September 11, 2020 beginning at 3pm PT. An update will be provided when the issue will get fixed.
Due to this indexing issue, many articles that were appearing in the “Top Stories” from a long time, are not qualifying for the top stories now.
Google gave credit to the company that identified the problem so that they can take necessary actions to take over quickly.