CTTelephonyNetworkInfo currentRadioAccessTechnology is always nil on Beta 4

Hello.

After I updated an iPhone 8 to the latest beta version (iOS 12 Beta 4) I saw that the login of the application we are developing is broken. I traced the problem back to the currentRadioAccessTechnology property of the CTTelephonyNetworkInfo class, property the app uses to detect if phone has an active cellular data connection. Anybody else faced this issue?

Thank you,

Levente