Hi Wes.
WA2AIB and myself have both experienced this.
He’s running iOS 18.0 and I’m running 18.1 beta 4.
After I end a call, phone audio including Voiceover transfers to the earpiece speaker at the top of the phone.
If I go out of mthe app to the home screen or anywhere else, normal auio is restored, and stays that way when I go back into RepeaterPhone.
73,
Chris