That sounds logical, since I presumed it was something super simple like that. I had no idea what that icon did (even hovering over it produces no clues since it’s not a link but Javascript or something). However, I did try clicking it in my mad search for answers.
Sadly, it does nothing when I click it in Chrome, but when I opened the same page in Firefox and clicked it, the titles reappeared! Yay, Diabolo! I searched for 30 minutes online for that stupid-simple solution and found nothing! Maybe I wasn’t calling it the right name (admin navigation bar? dashboard sidebar menu?)
Of course, even when I come back and refresh the Chrome page (the browser I use), the titles still don’t show. So this seems like a Chrome issue. I will try restarting Chrome, checking updates, etc. Thanks so much for your quick and helpful response!