User Account Service and webauthn

I upgraded Keycloak from 7.0.0 to 8.0.1 and configured the use of webauthn. It works great with YubiKey 5 NFC and with the touchID of the new Airbook using Chrome 79. User can register the webauthn device and use it for login.

Problem is that in the User Account Service s.a. https://myKeycloakServer/auth/realms/myrealm/account/ no webauth device is displayd. There seems to be the false theme. But in administrator console there is no option to chose a webauthn theme.

Could it be a problem because I did the upgrade from 8.0.1 and replaced the standalone directory?