Hi there, thanks for getting in touch about the page flashing, I am here to help. The behavior you are describing may be FOUT (a flash of unstyled text and usually occurs when text is finished loading before the Webfont.
A workaround to fix this common issue for webfonts is to add a little custom code to the head of the site:
<style> .wf-loading * { opacity: 0; } </style>
This typically fixes the latency on the fonts.
Here are some good resources:
- Some info on FOUT: FOUT, FOIT, FOFT | CSS-Tricks - CSS-Tricks
- Using custom code in the head and body: Custom code in head and body tags | Webflow University
Once you republish the site with the custom code added, the issue should be resolved.