It looks like `replyContainer()` is not registered as a bean, so its lifecycle is somehow out of application context control * Mark `replyContainer()` method as a `@Bean` in the `KafkaDslTests` and `KafkaDslKotlinTests` to see if this fixes flaky state of the test suite * Upgrade to Kotlin `1.7.20` and fix `KafkaDslKotlinTests` according to its requirements