Why is my custom font not displaying correctly on Safari or iPhones?

Custom typography breaks on iOS and Safari when cross-origin resource sharing (CORS) rules block external web fonts, when font file formats lack legacy modern extensions (WOFF2), or when CSS @font-face rules are improperly cached.

“Most minor website breaks are caused by simple script conflicts, legacy code blocks, or broken API handshakes. We identify and clear these issues immediately as a straightforward, one-time fix.”
— Jeff Bollettino, Managing Director, Ignite Conversions