[keycloak-user] Password Policies do not Work When There is a User Federation

I have build an custom user storage provider using this example https://github.com/thomasdarimont/keycloak-user-storage-provider-demo/tre... Unfortunately when you activate this user federation then password policies do not work. For example under Authentication -> Password Policy -> Add policy... -> Minimum Length. This does not work. Is there any workaround to activate password policies?