Hi,
Thank you for reaching out. I’ve compared your site with our demo, and I’m not seeing any issues with the fonts or stuttering. The CSS seems to be properly loaded in the demo site, and everything appears to be functioning smoothly.

Here are a few things to check:

Clear Browser Cache:

Sometimes, cached files can cause the site to display incorrectly. Try clearing your browser cache or open your site in an incognito window to see if the problem persists.

Plugin Conflict:

Disable any third-party plugins temporarily to check if any of them might be causing conflicts with the theme’s CSS.

Check for Missing Files:

Ensure that all the necessary theme files were uploaded properly. Sometimes, a file might be missing or corrupted during the installation process.

Custom CSS/Theme Customizer Settings:

If you’ve made any customizations or changes via the theme customizer, these might interfere with the default layout. You could reset to default settings to check if that resolves the issue.

Let me know how it goes or if you’d like further assistance.

Best regards,
Serkan