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

[Serial][sig-cli] oc adm upgrade recommend When the update service has conditional recommendations runs successfully when listing all updates [Suite:openshift/conformance/serial]

Significant regression detected.
Fishers Exact probability of a regression: 100.00%.
Test pass rate dropped from 100.00% to 94.64%.

Sample (being evaluated) Release: 4.21
Start Time: 2025-11-26T00:00:00Z
End Time: 2025-12-03T16:00:00Z
Success Rate: 94.64%
Successes: 53
Failures: 3
Flakes: 0
Base (historical) Release: 4.20
Start Time: 2025-09-21T00:00:00Z
End Time: 2025-10-21T23:59:59Z
Success Rate: 100.00%
Successes: 267
Failures: 0
Flakes: 0

View the test details report for additional context.

Filed by: dgoodwin@redhat.com