I'm using Elegant Themes Extra Theme and since I've updated it to the newest version, the cache from Hummingbird makes some trouble. The design is supposed to be white, but when Hummingbird is active, these settings doesnt apply anymore and it can only be the default color, which are dark blue colors. I've contacted Elegant Themes and they told me it is Hummingbird Cache that makes the issues.
I've tried to clear all settings, but it still gives the same problem afterwards.
I've granted access, so you can go in and try activating and deactivating it.