[keycloak-user] Disable 'secret question credentials' fails

Hey all, I'm having troubles with the custom authenticator example 'Secret Question'. Setup and workflow works fine, but I cannot disable the credential type for the users once set up. On a users credentials tab I select 'SECRET_QUESTION' and try to disable it, but it throws the following Error: Failed to disable credentials. The wildfly log states a stack overflow: Uncaught server error: java.lang.StackOverflowError at java.util.AbstractCollection.toArray(AbstractCollection.java:136) at java.util.LinkedList.addAll(LinkedList.java:408) at java.util.LinkedList.addAll(LinkedList.java:387) at org.keycloak.services.DefaultKeycloakSessionFactory.getProviderFactories(DefaultKeycloakSessionFactory.java:338) at org.keycloak.credential.UserCredentialStoreManager.getCredentialProviders(UserCredentialStoreManager.java:151) at org.keycloak.credential.UserCredentialStoreManager.disableCredentialType(UserCredentialStoreManager.java:214) at org.keycloak.examples.authenticator.SecretQuestionCredentialProvider.disableCredentialType(SecretQuestionCredentialProvider.java:88) and is repeating from then on. I've created a JIRA ticket that seems to be unnoticed so far https://issues.jboss.org/browse/KEYCLOAK-6308 I built a phone TAN authenticator using it as reference and there I am facing the same problem. I would like to share it as soon as I finish development. I don't know if it is caused by a misconfigured authenticator example or by keycloak itself, but I guess it is Keycloak. Any help is appreciated. Thanks, Benno