Only in release, and bt is corrupted, but I found the issue ;)
Pull request: https://github.com/WebKit/WebKit/pull/14537
Committed 264783@main (db3dda48a43a): <https://commits.webkit.org/264783@main> Reviewed commits have been landed. Closing PR #14537 and removing active labels.
<rdar://problem/110100736>