Bug control-center download button events with avro key not deser

With the image: confluentinc/cp-enterprise-control-center:6.1.0

when I click on the download button ( to download a message inside a topic )

the json file is correct except that the key ( a primitive avro key ) is not deser

[{"topic":"aaaa","partition":2,"offset":0,"timestamp":1621091829948,"timestampType":"CREATE_TIME","headers":[],"key":"\u0000\u0000\u0000\u0000\u0002\u000ede3a3f5","value":{"event_timestamp":123442,"event_datetime":"18","event_id":"aaaaaaaaaa","product_id":356}}]

in the UI of control-center the message key is well show ( deser )
Screenshot from 2021-05-15 17-27-12

Key : de3a3f5

So all avro primitives are not deser , if you open with google chrome , you will see that even in the UI the string is prefixed of unknow bytes.

control-center have exactly the same problem that AKHQ