I tested https://iolabs.io/ first time I visited it it gave me cache HIT .. I logged in then logged out and it is now giving Dynamic .. I noticed that xf_session cookie was not deleted on logout .. this must be the reason if you are using it in rule configuration .What URL exactly? Things look normal for the couple URLs I checked...
Code:age: 7370 cf-cache-status: HIT
Ya, that was something not in the addon itself, rather some JavaScript specific to the site. It should already been fixed (if you do a hard refresh, you should get the version where it's fixed).