I have multiple copies of things now, from where I was shuffling things around trying to figure out what was broken. It's one of these two, but I'm not certain which one, or if they're coded the same.
(Interestingly, the one that was "original" has no title in EN, but when I imported the notebook's ENEX during my attempts to test it, it gave it a title. In other words, they're two copies of what should be an identical note, but even EN is treating them differently.)
Not-Really-Blank-Note2.enex (1.7 KB) Not-Really-Blank-Note.enex (1.7 KB)