Caching is not a fully tested feature, and I wonder my reply will be correct.
You can use [third … cache=false] or delete all caches from the Admin > Posts > with [third] tags. A cache is meant for 5 hours.
If you have an access to the plugin directory via FTP, remove the cached files manually to hard reset everything: /wp-content/plugins/hosted-content-importer/caches
Do not delete index.php file.
