When use-realm-role-mappings and use-resource-role-mappings are set to true all previously found resource mappings are overwritten by the realm role mappings.

When the use-realm-role-mappings are being disabled using a oidc.json configuraion as follows the resource roles will be available only:

{
  "realm": "MYREALM",
  "auth-server-url": "https://keycloak.somedomain/auth/",
  "resource": "BisonProcess",
  "use-realm-role-mappings": false,
  "use-resource-role-mappings": true,
}

It is not possible to have a combined set by defining the following configuration:

{
  "realm": "MYREALM",
  "auth-server-url": "https://keycloak.somedomain/auth/",
  "resource": "BisonProcess",
  "use-realm-role-mappings": true,
  "use-resource-role-mappings": true,
}