TLS unsupported extenstion error

I got this error in the log repeatedly : http: TLS handshake error from remote error: tls: unsupported extension

Does anyone has an idea on what is happening here? It didn’t cause the vault down , the vault server has no error to run with this error log.

Something (at the IP address started in the message) is attempting to connect to your Vault server but failing to cleanly complete the connection.

To stop the messages, make it stop doing that.

As I checked, it was the fluentbit pod sent the message, how can I ask fluentbit stop doing it