Whatever the run is blocked on is rendered first rather than below a scrolling plan, because it is the only part of the page waiting on a person. This is the one agent on the page, so its status announces its own transitions — a list of runs each doing that would be noise, which is why the underlying component makes it opt in. Every completed action states whether it can be undone, offset or not taken back at all, in words, since presenting all three behind one Undo is a lie discovered after the click.