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

[sig-auth][Feature:OpenShiftAuthorization][Serial] authorization TestAuthorizationResourceAccessReview should succeed [apigroup:authorization.openshift.io] [Suite:openshift/conformance/serial]

Extreme regression detected.
Fishers Exact probability of a regression: 100.00%.
Test pass rate dropped from 100.00% to 0.00%.

Sample (being evaluated) Release: 4.20
Start Time: 2025-06-09T00:00:00Z
End Time: 2025-06-16T12:00:00Z
Success Rate: 0.00%
Successes: 0
Failures: 8
Flakes: 0

Base (historical) Release: 4.17
Start Time: 2024-09-01T00:00:00Z
End Time: 2024-10-01T00:00:00Z
Success Rate: 100.00%
Successes: 30
Failures: 0
Flakes: 0

View the test details report for additional context.

Important things to note here:

• hypershift was recently added to the default view for 4.20 release blocking signal
• this test is marked regressed because it seemingly never failed in the buildup to 4.17 GA, and now permafails in 4.20,
• it actually permafailed in 4.19 as well, unclear how long this has been broken
• we're only seeing it now because clearly nobody was watching these jobs, and it was not considered in component readiness prior to 4.20
• fixing may require discussions with hypershift, depending on what is going on here.

Another test seems to always fail in tandem with this:

[Serial] [sig-auth][Feature:OAuthServer] [RequestHeaders] [IdP] test RequestHeaders IdP [apigroup:config.openshift.io][apigroup:user.openshift.io] [Suite:openshift/conformance/serial]