On Tue, Dec 5, 2023 at 4:27 AM Ihor Radchenko <yantar92@posteo.net> wrote:

> Peter Mao <peter.mao@gmail.com> writes:
>
> > This is an incomplete initial bug report.  I don't have time right now to
> > chase down all the details.
> >
> > A couple of times in the past month, the subheadings in the org file I'm
> > working on (with lots of org-babel code blocks) disappear.  <TAB> does
> not
> > fold or unfold those headings, although the indicator (...) still shows.
> > ...
> > summary:
> > 1. subheading text disappears from org file, even in fundamental
> > 2. saving the buffer shows that the disappearance is cosmetic only
> > 3. I have not established reproducible conditions for this yet.
>
> Might be yet another problem with isearch + folding via text properties.
> You may try to set `org-fold-core-style' to 'overlays.
>
> --
> Ihor Radchenko // yantar92,
> Org mode contributor,
> Learn more about Org mode at <https://orgmode.org/>.
> Support Org development at <https://liberapay.com/org-mode>,
> or support my work at <https://liberapay.com/yantar92>
>

Thanks, Ihor.  I was suspecting isearch, but I can't chase reproducibility
yet.  I'll try out your suggestion.

Peter