I think it’s your page load animations. Similar issues happened to me, except the reverse. I built a page on Webflow in Safari, and it didn’t load properly in Chrome.
Turns out in Safari (updated version), the text looks good.
Maybe, you should try. Or if you still want to resolve the issue on Safari’s older version, you should inspect the style, maybe safari rewrites your style. I think the solution for that is to write a code so it covers the styling.