While responding to this topic, I found that creating the first saved query in a document overwrites the default Headings saved query.
EDIT: Also, a long query will do weird things to the popup window:
EDIT2: Also, can’t seem to drag an item all the way to the bottom:

EDIT3: If I dismiss filter after selecting saved query from the sidebar, the sidebar still highlights the last used query. Doesn’t seem to change if I use Go Back, so probably not intentional?

