CloudFlare will show a cached version of my site for crawlerbots, no matter if I purge the cache

If I visit my site with the user agent "Mozilla/5.0 (compatible; AhrefsBot/7.0; +http://ahrefs.com/robot/)" for the ahrefs crawler, I keep getting an outdated version of my site, even though if I visit it with the browsers default user agent, work without a problem.

I have clicked "Purge everything" 20 times already, and no matter what, I cannot seem to get the right result for the crawler user agent. Why could that be???
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