20:42
<Domenic>
JakeA: lol look what I found https://html.spec.whatwg.org/#current-entry-of-the-joint-session-history "Since each Document in a browsing context might have a different event loop, the actual state of the joint session history can be somewhat nebulous. For example, two sibling iframe elements could both traverse from one unique origin to another at the same time, so their precise order might not be well-defined;
20:42
<Domenic>
similarly, since they might only find out about each other later, they might disagree about the length of the joint session history."
20:51
<a-ja>
IOW ¯\_(ツ)_/¯