It appears that turning off APO has caused delays and 524 errors on your website. APO was previously caching everything, including members’ profile pages when logged in, which was causing issues. However, after turning off APO, you are now experiencing delays and errors that were not present before.
There could be multiple reasons why turning off APO has caused delays. For example, it is possible that APO was masking an underlying issue on your website, and now that it has been turned off, that issue is causing delays. Additionally, the delay could be caused by a change in server configuration or settings that occurred when APO was turned off.
To resolve the issue, you could try troubleshooting the server and website configuration to identify any potential issues. You could also consider reaching out to your web hosting provider or Cloudflare support for assistance in resolving the issue.