You are still able to use Leap when integrated via our WordPress plugin but not our caching. We don't recommend WordPress integration if possible for this reason, because as a result sites integrated via the plugin take 1.5 seconds longer to load on average than those that are cloud integrated.
To confirm, your site (including the front-end) went down when you were integrated via Cloudflare? If that's the case, could you confirm what your server IP at your host is? The reason that I ask is that you replaced the A record for your root domain (that you deleted on the 21st) with a different server IP on the 23rd and I want to double-check that the one we have on file now is correct - if it is not, that would explain why the site went down.