Prow recognizes the generated junit reports while Testgrid does not. Recently, Testgrid loses test-case level visibility due to report name mismatching the regex requirement.

Example https://k8s-testgrid.appspot.com/istio#e2e-suite-rbac-no_auth&show-stale-tests=