Hello,

the precache feature and AJAX generation is meant to be used when the realtime generation is not possible, for example huge sitemaps or images sitemap with a lot of links that would result in too much time to complete.

Yes, when the sitemap is generated through AJAX steps and cached, you need to start a new precaching process to refresh it.

If you delete or disable the precaching feature the sitemap is again generated in realtime and it updates itself automatically.

Greetings,

John