Description:
compositing/layer-creation/scale-rotation-animation-overlap.html

The first timeout that I observed for iOS Debug on the dashboard was on 4/14/2022 at 249631@main.  The first timeout that I observed for macOS Debug wk1 x86_64 was on 4/13/2022 at 249601@main.

REPRODUCTION STEPS
I can reproduce this on ToT ( 253057@main ).

Command: 
run-webkit-tests --ios-simulator --debug --exit-after-n-failures 1 --exit-after-n-crashes-or-timeouts 1 --iterations 50 --no-retry compositing/layer-creation/scale-rotation-animation-overlap.html

Result: 
Regressions: Unexpected timeouts (1)
  compositing/layer-creation/scale-rotation-animation-overlap.html [ Timeout ]

History:
[ iOS  Debug ]
https://results.webkit.org/?suite=layout-tests&test=compositing%2Flayer-creation%2Fscale-rotation-animation-overlap.html&platform=ios&style=debug&limit=50000
[ macOS Debug wk1 ] 
https://results.webkit.org/?suite=layout-tests&test=compositing%2Flayer-creation%2Fscale-rotation-animation-overlap.html&platform=mac&flavor=wk1&style=debug&architecture=x86_64&limit=50000

Diff: 
[ iOS  Debug ]
--- /Volumes/Data/worker/Apple-iPadOS-15-Simulator-Debug-WK2-Tests/build/layout-test-results/compositing/layer-creation/scale-rotation-animation-overlap-expected.txt
+++ /Volumes/Data/worker/Apple-iPadOS-15-Simulator-Debug-WK2-Tests/build/layout-test-results/compositing/layer-creation/scale-rotation-animation-overlap-actual.txt
@@ -1,3 +1,5 @@
+FAIL: Timed out waiting for notifyDone to be called
+
 (GraphicsLayer
   (anchor 0.00 0.00)
   (bounds 800.00 640.00)

stderr:
[ macOS Debug wk1 ] x86_64
2022-08-02 13:37:47.148 DumpRenderTree[42068:12065866] nil host used in call to allowsSpecificHTTPSCertificateForHost
2022-08-02 13:37:47.148 DumpRenderTree[42068:12065866] nil host used in call to allowsAnyHTTPSCertificateForHost: