The following links will also be posted for reference.
CF-Cache-Status: MISS occurs and the cause is unknown.
Once I changed my DNS to an origin server and put it back in Cloudflare’s DNS again, TTFB became slower. I think that is because it is not cached, but another site is operated with the same DNS, and that is cached and it has been getting the best performance.
I will attach three types of images, so I hope you can see them.
1.Problem site (origin server)
2.Problem site (Cloudflare server)
3.Sites on the same DNS (Cloudflare server)
Both sites use almost the same plug-ins, and the only difference is the theme. I tried to change the theme of the problem site to see if the difference in speed (not cached) in TTFB is due to the theme, but I did not see improvement in TTFB, and cache was did not.
If the cause is not a theme, is it a plug-in that you must doubt? Or is there anything else that might be a possible cause?
Cloudflare’s Cache Level is Cache Everything at the same settings for both sites.
We look forward to your advice and verification methods.