Memory leak with spring-kafka 2.8.0

Updating Spring Boot 2.5.7 to 2.6.1 brings spring-kafka 2.8.0, in a service with a massive kafka producer it causes a memory leak.

Rolling back to Spring Boot 2.5.7 fix the issue.

Sample Producer:

@Component
class KafkaProducer(
    private val kafkaTemplate: KafkaTemplate<String, MyObject>,
    private val kafkaLoggerCallback: KafkaLoggerCallback
) {

    @Async
    @EventListener
    fun process(id, String, event: MyObject) {
        kafkaTemplate.send("topic", id, event).addCallback(kafkaLoggerCallback)
    }

}