306278 2026-01-26 09:38:28 -0800 REGRESSION(303527@main): [MacOS arm] media/media-source/media-managedmse-resume-after-remove.html is a flaky test failure. 2026-01-28 14:29:45 -0800 1 1 1 Unclassified WebKit Media WebKit Nightly Build Unspecified Unspecified NEW InRadar P2 Normal --- 1 d_delatoba webkit-unassigned jbedard webkit-bot-watchers-bugzilla webkit-bug-importer oldest_to_newest 2175148 0 d_delatoba 2026-01-26 09:38:28 -0800 media/media-source/media-managedmse-resume-after-remove.html is a flaky text failure on MacOS Sequoia+ arm. Found failures as far back as the test was introduced. TEXT DIFF: --- /Volumes/Data/worker/Apple-Tahoe-Release-AppleSilicon-WK2-Tests/build/layout-test-results/media/media-source/media-managedmse-resume-after-remove-expected.txt +++ /Volumes/Data/worker/Apple-Tahoe-Release-AppleSilicon-WK2-Tests/build/layout-test-results/media/media-source/media-managedmse-resume-after-remove-actual.txt @@ -17,7 +17,7 @@ EVENT(waiting) EXPECTED (video.currentTime >= '1.5') OK EXPECTED (video.readyState == '1') OK -EXPECTED (video.currentTime == currentTime == 'true') OK +EXPECTED (video.currentTime == currentTime == 'true'), OBSERVED 'false' FAIL EXPECTED (video.readyState == '1') OK RUN(sourceBuffer.appendBuffer(loader.mediaSegment(0))) EVENT(update) TEXT URL: https://build.webkit.org/results/Apple-Tahoe-Release-AppleSilicon-WK2-Tests/306203@main%20(1288)/media/media-source/media-managedmse-resume-after-remove-pretty-diff.html STEPS TO REPRODUCE: I was able to reproduce this on MacOS ToT with the following: run-webkit-test s--no-retry --force --iterations 2000 media/media-source/media-managedmse-resume-after-remove.html 2175150 1 webkit-bug-importer 2026-01-26 09:38:35 -0800 <rdar://problem/168927081> 2175157 2 d_delatoba 2026-01-26 10:08:40 -0800 Regression appears to start at 303527@main. I am going to mark expectations as pass/fail while this pends investigation. 2175163 3 d_delatoba 2026-01-26 10:18:35 -0800 Pull request: https://github.com/WebKit/WebKit/pull/57267 2175189 4 ews-feeder 2026-01-26 11:47:59 -0800 Test gardening commit 306229@main (6a8e7f9444c6): <https://commits.webkit.org/306229@main> Reviewed commits have been landed. Closing PR #57267 and removing active labels.