Ajax WP JSON API request kills home page cache

Hey guys,

The home page of this website wasn’t caching.

The debug log said it was working fine, like this:

`
05:53:44 18946 / Renamed temp supercache file to /httpdocs/wp-content/cache/supercache/www……com.au/index-https.html
05:53:44 18946 / Renamed temp supercache gz file to /httpdocs/wp-content/cache/supercache/www…………com.au/index-https.html.gz
`

But the cache folder was always empty, and it was always regenerating a cache file with a new timestamp.

So something was deleting the index* files between the time they were generated and the next request.

There is a wp-json javascript call from the home page (and other pages). It was triggering wp_cache_ob_callback which seemed to remove everything in the cache folder.

`
07:03:31 20917 /wp-json/facetwp/v1/refresh Not caching POST request.
07:03:31 20917 /wp-json/facetwp/v1/refresh wp_cache_ob_callback clearing rebuilt files in /httpdocs/wp-content/cache/supercache/www……com.au/
`

No idea what’s going on really, but I took a sledgehammer approach and commented out the unlink in wp_cache_ob_callback so that my home page would cache.

Is there any way to figure out why a POST to /wp-json/facetwp/v1/refresh is killing the home page cache?

Cheers,
Dave