Missing `userId` field on `HumanUser` API v2 responses

When calling the endpoint POST https://$CUSTOM-DOMAIN/v2/usersPOST https://$CUSTOM-DOMAIN/v2/users on Zitadel API v2, result[x].humanresult[x].human fields of type HumanUserHumanUser previously contained a userIduserId field. This no longer seems to be the case. Is this normal and expected? Because the documentation always indicates the presence of this field.