Genesys Cloud JS SDK auto-refresh not triggering

Migrating from manual token handling to the official genesys-cloud-node-js SDK. The docs claim it auto-refreshes the token when expired. We’re hitting a 401 on /api/v2/users/me after 30 mins. The SDK doesn’t seem to catch the refresh. Is there a specific config flag for the PlatformClient to enable this, or do we still need a custom interceptor? Here’s the init: