Reason unknown
Unfortunately since version 2.20 came out i have had a lot of issues with it. Support has tried to help but so far no solution except to remove plugin and revert to traditional means using another caching plugin.Two stars because it used to be such an effortless and efficient plugin… but now it has become the opposite for my sites. The CDN itself is great!
https://wordpress.org/support/topic/version-2-x-breaks-support-for-some-loadbalanced-websites
So I checked the reviews and noted a familiar pattern in the reviews: Lots of 5-star reviews from people who only wrote one review. What do you think?