Request header field prismic-ref is not allowed by Access-Control-Allow-Headers in preflight response

Hi there,
This seems to be a tricky issue, I've been able to reproduce this issue on IOS 12.4 but for us this a corner issue for your dev team.

If someone can reproduce and post the reproduction of this issue on a desktop browser or recent IOS/Android system it will be very helpful.

Looking forward to your reply,
Fares