We've noticed that the "Call me At" feature on iOS won't accept a call back phone number unless the country code is included. We don't see this happening on Android. It's causing confusion as it never used to insist on the country code and with a large user base of mixed Android and iOS, it's going to be a pain to target comms.
Is there a setting someplace that I may have missed? I've checked working location and that's correct. I can replicate the issue on my test iPhone so it's not just one user.