Debezium header.key has a weird prefix for all events

I see this byte prefix being attached to every event header.key 

```

{
"CreateTime": 1634193848526,
"key": "\u0000\u0000\u0001��{\"id\":438147561,\"_dbz_physicalTableIdentifier\":\"######\"}",
"offset": 8856076,
"partition": 0,
"topic": "########"
}

```

Is there any way we can remove this, is this the magic byte?