I am using the “page everything” Page rule with the Edge Cache TTL of 1 month.
What makes me wonder is that if I make a request like in the morning the TTFB is like over 1 second. All requests after that the TTFB reduces to 70ms. It almost feels like a browser cache when I visit a website for the second time. But after some time the TTFB spikes again to over 1 second, almost as if Cloudflare drops the cached page after a certain time.
Any guesses why?