IT test in process-kafka-quickstart-springboot example fails in the CI

Downstream build often fails due to the unstable test MessagingIT located in https://github.com/kiegroup/kogito-examples/tree/stable/process-kafka-quickstart-springboot

[2021-08-05T12:24:58.775Z] [ERROR] Tests run: 1, Failures: 1, Errors: 0, Skipped: 0, Time elapsed: 30.317 s <<< FAILURE! - in org.acme.travel.MessagingIT
[2021-08-05T12:24:58.775Z] [ERROR] org.acme.travel.MessagingIT.testProcess Time elapsed: 10.895 s <<< FAILURE!
[2021-08-05T12:24:58.775Z] org.opentest4j.AssertionFailedError: expected: <0> but was: <3>
[2021-08-05T12:24:58.775Z] at org.acme.travel.MessagingIT.testProcess(MessagingIT.java:93)

e.g. here: https://eng-jenkins-csb-business-automation.apps.ocp4.prod.psi.redhat.com/blue/rest/organizations/jenkins/pipelines/KIE/pipelines/kogito/pipelines/pullrequest/pipelines/main/pipelines/optaplanner.tests.downstream.examples/runs/57/nodes/272/steps/288/log/?start=0