I’ve been working on topics in the TOC view (tab). When
I switched to the Project view (tab) to edit a topic, the right
pane displayed the original topic I was working in. So I tried
opening a couple other topics from the Project tab, and there was
no change. I then switched back to the TOC view and double-clicked
another topic, it still displayed the original topic. My solution
at this point was to save all information, then close and reopen
the project file.