Windows Admin Center Built-in Administrators

Windows Admin Center 1910.2 and before insists on using Built In Administrators as Gateway Admins.  This is horrible in a domain situation.  The group will likely include Domain Admins at a minimum.  Many, if not all of these don't need to be gateway admins.  I get that its a great starting posture but fails shortly later. 

Thoughts. 

1. Is there a method that is not advertised for this?
2. Can this be disabled if anther security group is in place? 
3. Can Registry be leveraged to turn this off?  

I love WAC but this issue leaves me in a tough place