I'm not sure if it's because of the latest test version. But if I only update the metadata of a story via the website, the number of chapters in FFN is ignored and not updated. The number of words, for example, is recorded correctly.
Example 1:
https://www.fanfiction.net/s/1420544...nting-Melodies
Example 2:
https://www.fanfiction.net/s/14427052/1/Harry-Uchiha
On other pages (tested on AO3) it still works.