If we have an ion-radio-group with a formControlName, and nested in that ion-radio-group we have ion-radio elements with value attributes, and also other elements with value attributes (such as ion-datetime in our case), the ion-radio-group form control value will be the value of whatever child element value was last set.
<ion-radio-group formControlName="hoursType" class="time-group">
<div class="weekdays-time">
<ion-item>