(Feel free to update this bug's summary to be more specific.)
Component Readiness has found a potential regression in the following test:

[sig-api-machinery] Discovery should validate PreferredVersion for each APIGroup [Conformance]

Extreme regression detected.
Fishers Exact probability of a regression: 100.00%.
Test pass rate dropped from 100.00% to 80.56%.

Sample (being evaluated) Release: 4.22
Start Time: 2026-01-23T00:00:00Z
End Time: 2026-01-30T12:00:00Z
Success Rate: 80.56%
Successes: 29
Failures: 7
Flakes: 0
Base (historical) Release: 4.21
Start Time: 2025-12-31T00:00:00Z
End Time: 2026-01-30T12:00:00Z
Success Rate: 100.00%
Successes: 115
Failures: 0
Flakes: 0

View the test details report for additional context.

Consistent failure that was not occurring prior to 4.22:

[sig-api-machinery] Discovery should validate PreferredVersion for each APIGroup [Conformance] expand_less 	5s
{  fail [k8s.io/kubernetes/test/e2e/apimachinery/discovery.go:145]: Fail to access: /apis/stable.e2e-validating-admission-policy-1181/: the server could not find the requested resource}

Filed by: dgoodwin@redhat.com