[Hummingbird] Cached page not being created by Hummingbird

Hummingbird is not creating a cache file for http://cylerity.com home page. It is creating a cache file for the page http://cylerity.com/case-study-new-objectives/ And it is creating a cached version of other sites on the same multisite install, such as http://eletrope.agency I have verified this by watching (via FTP) cache files being created and by inspecting the served HTML to look for the Hummingbird comment. I have deactivated, deleted, installed and reactivated the plugin. There are no other cache plugins installed. Support access has been granted for wpn03.eletrope.net