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[CI Postmortem] Flaky: TestNSUrlSessionEphemeralHandlerCookies on iOS/MacCatalyst #25384

@rolfbjarne

Description

@rolfbjarne

Flaky Test Report (automated)

Test: MonoTests.System.Net.Http.MessageHandlerTest.TestNSUrlSessionEphemeralHandlerCookies
Platforms: iOS, MacCatalyst
Period: May 4–11, 2026
Category: Flaky (cross-PR, different bots)

Occurrence Summary

PR Build Bot Direct Link
#25340 14024333 VSCXSDKs-MINI-062 Run tests
#25357 14036519 MACIOSMINI-010 Run tests
#25331 14019009 VSCXSDKs-MINI-023 Run tests
#25331 14016858 VSCXSDKs-MINI-005 Run tests
#25320 14017122 VSCXSDKs-MINI-038 Run tests
#25300 14005331 VSCXSDKs-MINI-087 Run tests
#24228 14036449 VSCXSDKs-MINI-023 Run tests

Total: Failed in 7 builds across 6 unrelated PRs

Error Details

  Managed Cookie Value
  Expected: True
  But was:  False

Classification

This failure was identified as flaky because:

  • It appeared across 6 unrelated PRs
  • It occurs on many different bots (no bot-specific pattern)
  • The cookie value assertion is timing/network-dependent

This issue was automatically generated by CI post-mortem analysis.

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bugIf an issue is a bug or a pull request a bug fixci-failureThe issue only affects CIci-postmortemCI post-mortem analysis: flaky tests, infrastructure failures, shared regressionscopilot

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