When having the same document open in two panes (e.g. writing notes at the bottom of the document in one pane, reviewing notes in the top/middle of the document in another pane), when focused on one of the panes, if you click a heading in the outline pane, it will scroll to that heading in BOTH of the panes with that document open, not the one pane that it focused.
Clicking a heading in the markdown outline should only navigate to that heading in the active pane.
No workaround. Can’t use markdown outline navigation if you are working in two parts of the same document at a time.