Update:
I mean, since text fields can be searched, it stands to reason that any field values displayed in the view should also be searchable. These field values should take precedence over text fields—for example, subtitles, captions, and so on. Do not skip these fields during a search just because they are not required.
It doesn’t look like that right now. That’s strange.
For example, I have a tiddler with the caption “1234,” but when I type “1234” into the search box, I don’t get any results.

