I've noticed that in the API Explorer documentation, the response models for the GET /api/v2/externalcontacts/scan/* requests do not include the "cursors" attribute.
In the SDKs those attributes are not defined in the response classes either. E.g.:
Sorry for the delay. Chatted with Dev Team. A fix was made and is currently in review with a pull request. They do not have an ETA but my guess is that once it gets merged it will be deployed within a week.
Thanks,
John Carnell
Manager, Developer Engagement