css.php

So, it seems that cloudflare keeps sending the same 3 things over & over constantly; being the woff, woff2 files and the css.php file to bing... Is the problem being dynamic content or is it a bug within xenforo causing this?

I would love to see a smarter css.php to only really serve the CSS that a page requires. This is code coverage for just XF 2.1 index page where 362,543 bytes or 94.1% of first css.php bytes are unused on the index page ! In terms of Google Lighthouse/Page Speed Insights v6 metrics, that is...