Several failures are due to failed to delete bootstrap_ssh_in security rules during deleting bootstrap resources.

Sample failed job: https://prow.ci.openshift.org/view/gs/test-platform-results/logs/periodic-ci-openshift-release-master-ci-4.19-upgrade-from-stable-4.18-e2e-azure-ovn-upgrade/1923491619114323968

And same issues can also be found from terraform-based installation.

https://search.dptools.openshift.org/?search=Operation+DeleteSecurityRuleOperation&maxAge=168h&context=1&type=bug%2Bissue%2Bjunit&name=azure&excludeName=&maxMatches=5&maxBytes=20971520&groupBy=job

Component Readiness has found a potential regression in the following test:

install should succeed: overall

Significant regression detected.
Fishers Exact probability of a regression: 100.00%.
Test pass rate dropped from 98.63% to 89.05%.
Regression is triaged and believed fixed as of 2025-05-15T03:00:00Z.

Sample (being evaluated) Release: 4.19
Start Time: 2025-05-13T00:00:00Z
End Time: 2025-05-20T00:00:00Z
Success Rate: 89.05%
Successes: 179
Failures: 22
Flakes: 0

Base (historical) Release: 4.17
Start Time: 2024-09-01T00:00:00Z
End Time: 2024-10-01T00:00:00Z
Success Rate: 98.63%
Successes: 865
Failures: 12
Flakes: 0

View the test details report for additional context.