I'm not doing anything with org-fold-core-style directly. The only maybe relevant thing I do after (org-mode) is:
(straight-use-package 'org-modern)
(global-org-modern-mode)
(setq org-pretty-entities t)
(setq org-pretty-entities-include-sub-superscripts nil)
(setq org-ellipsis "…")
(setq org-modern-hide-stars nil) ; somehow fixes indentation of body

And I think that I can only do it after loading org-mode.

Am Sa., 6. Mai 2023 um 09:36 Uhr schrieb Ihor Radchenko <yantar92@posteo.net>:
Michael Dauer <mick.dauer@gmail.com> writes:

> This sibling branch works:
> Text content at position 27007:
>
>
> There are text properties here:
>   fontified            t
>   isearch-open-invisible org-fold-core--isearch-show
>   isearch-open-invisible-temporary org-fold-core--isearch-show-temporary
>   org-fold--spec-org-fold-outline-1035805047878762682 org-fold-outline

If you have both Org fold overlay and text properties at the same time,
you are doing something funny with `org-fold-core-style'. If you do set
it, please only do it before Org is loaded.

--
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>