Description: fast/animation/request-animation-frame-throttling-detached-iframe.html The test was consistently passing. Ventura release wk1 began fail in range https://commits.webkit.org/compare/264776@main...264774@main . Ventura release wk2 arm64 began to fail in range https://commits.webkit.org/compare/259505@main...259498@main . Monterey release wk1 x86_64 began to fail in range https://commits.webkit.org/compare/264914@main...264911@main . On the bots that the test is failing it is a constant failure. On the bots that it is passing it is constantly passing. This issue can be reproduced on bot212 using the command: run-webkit-tests --no-build --release --dump-render-tree --debug-rwt-logging --no-retry-failures fast/animation/request-animation-frame-throttling-detached-iframe.html History: https://results.webkit.org/?limit=5000&suite=layout-tests&test=fast%2Fanimation%2Frequest-animation-frame-throttling-detached-iframe.html&platform=mac&style=release&recent=false Diff: @@ -4,27 +4,27 @@ PASS internals.requestAnimationFrameThrottlingReasons() is "[Unthrottled]" -PASS internals.requestAnimationFrameInterval is 0.015 +FAIL internals.requestAnimationFrameInterval should be 0.015. Was 0.03333333333333333. PASS frame.contentWindow.internals.requestAnimationFrameThrottlingReasons() is "[Unthrottled]" -PASS frame.contentWindow.internals.requestAnimationFrameInterval is 0.015 +FAIL frame.contentWindow.internals.requestAnimationFrameInterval should be 0.015. Was 0.03333333333333333. internals.setLowPowerModeEnabled(true); PASS internals.requestAnimationFrameThrottlingReasons() is "LowPowerMode" -PASS internals.requestAnimationFrameInterval is 0.030 +FAIL internals.requestAnimationFrameInterval should be 0.03. Was 0.06666666666666667. PASS frame.contentWindow.internals.requestAnimationFrameThrottlingReasons() is "LowPowerMode" -PASS frame.contentWindow.internals.requestAnimationFrameInterval is 0.030 +FAIL frame.contentWindow.internals.requestAnimationFrameInterval should be 0.03. Was 0.06666666666666667. frame.remove() document.body.appendChild(frame) PASS internals.requestAnimationFrameThrottlingReasons() is "LowPowerMode" -PASS internals.requestAnimationFrameInterval is 0.030 +FAIL internals.requestAnimationFrameInterval should be 0.03. Was 0.06666666666666667. PASS frame.contentWindow.internals.requestAnimationFrameThrottlingReasons() is "LowPowerMode" -PASS frame.contentWindow.internals.requestAnimationFrameInterval is 0.030 +FAIL frame.contentWindow.internals.requestAnimationFrameInterval should be 0.03. Was 0.06666666666666667. frame.remove() internals.setLowPowerModeEnabled(false); PASS internals.requestAnimationFrameThrottlingReasons() is "[Unthrottled]" -PASS internals.requestAnimationFrameInterval is 0.015 +FAIL internals.requestAnimationFrameInterval should be 0.015. Was 0.03333333333333333. document.body.appendChild(frame) PASS frame.contentWindow.internals.requestAnimationFrameThrottlingReasons() is "[Unthrottled]" -PASS frame.contentWindow.internals.requestAnimationFrameInterval is 0.015 +FAIL frame.contentWindow.internals.requestAnimationFrameInterval should be 0.015. Was 0.03333333333333333. PASS successfullyParsed is true TEST COMPLETE