Some cache problems

I have a wordpress-site that i have Cloudflare on. After i put on Argo and set it up, the site is responsive, but i have a weird thing thats happening when i load the page. For a halv secound the page seams weird, before it loads. It looks like the theme is not working properly.

Does anyone have some tips?

Alf - Norway

It’s definitely not a caching problem. CSS is delayed. But this only happens when I test with Firefox. With Brave/Chrome, it’s fine. Even a GTMetrix test shows a normal load in Chrome:

Here’s the Firefox delay: