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

install should succeed: overall

Extreme regression detected.
Fishers Exact probability of a regression: 100.00%.
Test pass rate dropped from 98.88% to 57.89%.
Overrode base stats using release 4.17

Sample (being evaluated) Release: 4.19
Start Time: 2025-03-03T00:00:00Z
End Time: 2025-03-10T08:00:00Z
Success Rate: 57.89%
Successes: 22
Failures: 16
Flakes: 0

Base (historical) Release: 4.17
Start Time: 2024-09-01T00:00:00Z
End Time: 2024-10-01T00:00:00Z
Success Rate: 98.88%
Successes: 88
Failures: 1
Flakes: 0

View the test details report for additional context.

gcp installs seem to be failing frequently with the error:

These cluster operators were not stable: [openshift-samples]

From: https://prow.ci.openshift.org/view/gs/test-platform-results/logs/periodic-ci-openshift-release-master-ci-4.19-e2e-gcp-ovn-techpreview/1898814955482779648

The samples operator reports:

status:
  conditions:
    - lastTransitionTime: "2025-03-09T19:56:05Z"
      status: "False"
      type: Degraded
    - lastTransitionTime: "2025-03-09T19:56:17Z"
      message: Samples installation successful at 4.19.0-0.nightly-2025-03-09-190956
      status: "True"
      type: Available
    - lastTransitionTime: "2025-03-09T20:43:02Z"
      message: "Samples installed at 4.19.0-0.nightly-2025-03-09-190956, with image import failures for these imagestreams: java,kube-root-ca.crt,openshift-service-ca.crt,nodejs; last import attempt 2025-03-09 19:57:39 +0000 UTC"
      reason: FailedImageImports
      status: "False"
      type: Progressing

I'm confused how this is failing install given available=true and degraded=false, and yet there does appear to be a problem reported in the message. It is possible this artifact was collected a few minutes after the install failed, is it possible the operator stabilizes (ignores these errors) in that time? Note that not all installs are failing this way, but a good chunk.

Problem appears limited to 4.19 gcp, I do see one hit for vsphere though.

https://search.dptools.openshift.org/?search=These+cluster+operators+were+not+stable%3A.*openshift-samples&maxAge=48h&context=1&type=build-log&name=&excludeName=&maxMatches=5&maxBytes=20971520&groupBy=job