https://prow.ci.openshift.org/view/gs/origin-ci-test/pr-logs/pull/openshift-knative_serverless-operator/1283/pull-ci-openshift-knative-serverless-operator-main-4.9-upgrade-tests-aws-ocp-49/1456184843606953984 for a build that shows this.

The 1.20 release forces a redeploy/upgrade of the gateway, so it's most likely in that realm somewhere.