https://commits.webkit.org/267076@main didn’t get the ToggleEvent oldState value set correctly in the case where the <details> element is open and closed multiple times (toggled back and forth)
Pull request: https://github.com/WebKit/WebKit/pull/16881
Submitted web-platform-tests pull request: https://github.com/web-platform-tests/wpt/pull/41559
Committed 267089@main (06b30c68edf9): <https://commits.webkit.org/267089@main> Reviewed commits have been landed. Closing PR #16881 and removing active labels.
<rdar://problem/114198127>