I haven’t made any intentional changes. I ported my site over from a previous (now unsupported/broken) theme, so perhaps something came along with it, though the titles used to show in the old site. I added just this bit of code I found to get rid of the “Home” title on the home page, but if I remove it, that’s the only thing that changes. (That font is very hard to read for some words, “Video” being the worst.)
I see that I can add a “title block” to the post to force it to show a title, though that’s really just adding the text a second time. I’d appreciate a fix that simply kept the title. I’ve seen the “Aside” issue but my posts are not categorized that way, and I don’t see any options for choosing the title to appear, or not.