Michaelsy wrote
This does not clear the entire DokuWiki cache.
https://www.dokuwiki.org/caching#purging_the_cache says it does:
All of DokuWiki's cache files can be easily invalidated by “touching” the conf/local.php file and thus changing its last modification timestamp. This can be done by:
simply resaving the configuration from the Configuration Manager,
using the Unix command touch
or opening and saving the file in your favorite editor.
But as I said, I don't think it is a DokuWiki-cache-issue.