I face a similar issue. I’ve enabled page cache (disk enhanced or memcached), and cache preload with 300 update interval and 50 pages per interval (while using a sitemap of all my pages, around 450 and leaving advanced options to default), so it should preload all my pages in under an hour, right? However, if I purge the page cache and leave the system overnight, the next day I can see using my browser (multiple browsers/machines tested, also cleaning local cache) that the pages are not preloaded. I also tried using wp-cli and UNIX cron, and that didn’t solve the issue either. Am I doing something wrong? I disabled browser cache for troubleshooting reasons. My site has no traffic as it isn’t published yet.
