Load events are currently not sent to remote frame's owner elements. This is because with site isolation, a frame’s owner element may be in a different process than the frame is.
<rdar://problem/115570366>
Pull request: https://github.com/WebKit/WebKit/pull/17826
Committed 268050@main (92dfc548276f): <https://commits.webkit.org/268050@main> Reviewed commits have been landed. Closing PR #17826 and removing active labels.