WordPress caddy dilemma

I have my own hosting wordpress pages.
The web server is used apache2 and the reverse proxy was nginx.
When I used nginx, everything was fine (wordpress loaded very quickly).
I recently switched from nginx reverse proxy to caddy reverse proxy.
Everything seems to work well with the caddy as well. However, the wordpress website takes a very long 5-7 seconds to load.
When I used nginx, it was very fast. I never detected the loading time, because the website loaded instantly.
I also solved it on the caddy forum, but according to them everything is fine. I’m afraid it’s not right. Maybe it is necessary to use some hacks in caddyfile, but I really have no idea.