post-migration FOUT and url path issues.

Hi folks!
I’ve migrated a site to a new install on siteground.

After migration, I’m seeing 404’s on the font loading in the network section of the browser dev tools, because it’s looking for the old location, pre-migration. I used perfmatters pre-load feature, and reset these to the current relative path, but that didn’t seem to solve the issue.

I used the the gp font library, actually uninstalled/reinstalled the fonts, and am getting an error where the browser is looking for the fonts at the old url (staging38.domain.com) instead of the correct folder domain.com. urls in private window.

If you can provide guidance about how to solve this, I’d appreciate it. A bit of research has told me that this has something to do with caching, but I’ve flushed every cache on the planet- cloudflare, siteground, browser, etc. and nothing seems to fix it.

Thank you

Michael