Kafka JMX missing data

Question

I have two kafka cluster each one exporting metrics via JMX and prometheus. Some data are missing from one of the deployment. I add that both configuration for JMX or for Logging looks the same, and my test clients are also the same. I can't attach image so I'll try to describe what I see in Jconsole:

When I'm connected directly to the JMX port I have:
on the left :

kafka.server

• Fetch
  • Attributes
    • queue-siez
  • FETCH
    • Attributes
      • byte-rate
      • trhottle-time
• Produce
  • Attributes
    • queue-siez
  • PRODUCE
    • Attributes
      • byte-rate
      • trhottle-time

On the right:

kafka.server

• Fetch
  • Attributes
    • queue-siez
  • CN%3Dbroker-connect
    • attributes
      • byte-rate
      • trhottle-time
  • perf-user
    • attributes
      • byte-rate
      • trhottle-time
• Produce
  • Attributes
    • queue-siez
  • CN%3Dbroker-connect
    • attributes
      • byte-rate
      • trhottle-time
  • perf-user
    • attributes
      • byte-rate
      • trhottle-time

So in the right JMX we can see that we have the detail for each of my connected clients (MTLS or OAUTH clients) but on the left nothing. I guess that I can see the global value of byte-rate for all produce request but I can't see each clients. Does someone have a clue on what can cause that difference ?