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    <body><table border="1" cellspacing="0" cellpadding="8">
        <tr>
          <th>Bug ID</th>
          <td><a class="bz_bug_link 
          bz_status_NEW "
   title="NEW - transitions/transition-end-event-nested.html is a flaky failure"
   href="https://bugs.webkit.org/show_bug.cgi?id=228002">228002</a>
          </td>
        </tr>

        <tr>
          <th>Summary</th>
          <td>transitions/transition-end-event-nested.html is a flaky failure
          </td>
        </tr>

        <tr>
          <th>Product</th>
          <td>WebKit
          </td>
        </tr>

        <tr>
          <th>Version</th>
          <td>WebKit Nightly Build
          </td>
        </tr>

        <tr>
          <th>Hardware</th>
          <td>Unspecified
          </td>
        </tr>

        <tr>
          <th>OS</th>
          <td>Unspecified
          </td>
        </tr>

        <tr>
          <th>Status</th>
          <td>NEW
          </td>
        </tr>

        <tr>
          <th>Severity</th>
          <td>Normal
          </td>
        </tr>

        <tr>
          <th>Priority</th>
          <td>P2
          </td>
        </tr>

        <tr>
          <th>Component</th>
          <td>Animations
          </td>
        </tr>

        <tr>
          <th>Assignee</th>
          <td>webkit-unassigned@lists.webkit.org
          </td>
        </tr>

        <tr>
          <th>Reporter</th>
          <td>ehutchison@apple.com
          </td>
        </tr>

        <tr>
          <th>CC</th>
          <td>dino@apple.com, graouts@apple.com
          </td>
        </tr></table>
      <p>
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        <pre>Created <span class=""><a href="attachment.cgi?id=433616" name="attach_433616" title="Test List">attachment 433616</a> <a href="attachment.cgi?id=433616&action=edit" title="Test List">[details]</a></span>
Test List

transitions/transition-end-event-nested.html

is a flaky failure.

History: <a href="https://results.webkit.org/?suite=layout-tests&test=transitions%2Ftransition-end-event-nested.html&platform=ios&platform=mac">https://results.webkit.org/?suite=layout-tests&test=transitions%2Ftransition-end-event-nested.html&platform=ios&platform=mac</a>

Diff: --- /Volumes/Data/worker/bigsur-debug-applesilicon-tests-wk2/build/layout-test-results/transitions/transition-end-event-nested-expected.txt
+++ /Volumes/Data/worker/bigsur-debug-applesilicon-tests-wk2/build/layout-test-results/transitions/transition-end-event-nested-actual.txt
@@ -2,5 +2,7 @@

 PASS --- [Expected] Property: background-color Target: box2 Elapsed Time: 0.2
 PASS --- [Expected] Property: left Target: box1 Elapsed Time: 0.2
-PASS --- [Expected] Property: width Target: box3 Elapsed Time: 0.3

+FAIL - Missing events
+[Missing] Property: width Target: box3 Elapsed Time: 0.3
+

Unable to reproduce issue using attached test list with run-webkit-tests -f -1 --iterations 5 --debug --test-list= on <a href="https://commits.webkit.org/r279863">r279863</a> along with <a href="https://commits.webkit.org/r279910">r279910</a> and <a href="https://commits.webkit.org/r279945">r279945</a> with the -1 flag. 

Issue is occurring primarily on arm64 debug although there are instances of it on x86 and release versions.</pre>
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