Unable to fix ringtone issues on Phonak hearing aids with iPhone 13

Ringtone now audibly comes through both hearing aids and Iphone 13 ever since updating to IOS 18.1.1. Prior to this, the ringtone only came through my hearing aids. Phone calls and streaming are all unchanged, still come through the hearing aids as before. I contacted Phonak support regarding this and they stated this issue is outside of their scope of support and should be directed to Apple Support. Anyone else having this issue with IOS 18 update?

[Re-Titled by Moderator]