Something I noticed the other day is that the Document Notes pane is missing the Remove Link option. The only way I can find to delete a link is to select and remove it (text and all). This isn’t so terrible, but if the link is the only text in the Document Notes pane, then it gets tricky to manage, because when I start typing something, it has actually retained the link style (new text is trying to link). I have to paste in some other text to clear the link.
Thanks, this is on the list with some other tweaks to the document notes context menu. Meanwhile you can select the text and use Edit > Remove Link in the main menu.