During the implementation of Gateway API telemetry, the monitoring team detected that there was a possible unavailability (or flake) during the test execution that caused the Gateway to be killed.

More details can be found on the PR https://github.com/openshift/cluster-monitoring-operator/pull/2734#pullrequestreview-3432480273 and following comments  

4.21    

TBD / Needs new test executions and metrics gathering    

    1. Run a new test with Gateway API
    2. Verify if the istio-proxy container is killed
    3. Get logs/metrics and verify if this is the expected behavior during test execution or if this can be a potential problem