Publish.full.document.only=true seems not working

Hi All,

Whenever I set publish.full.document.only = true in the MongoDB kafka source connector configuration, I am always getting the published data to the topic with all the fields set to “null”. Maybe I am missing something.

{
  "_id": "63f8fbc755ae31f29077c207",
  "clusterTime": null,
  "documentKey": null,
  "fullDocument": null,
  "lsid": null,
  "ns": null,
  "operationType": null,
  "to": null,
  "txnNumber": null,
  "updateDescription": null
}