Just making a note that I reported this as an org-mode bug yesterday, but that was because I had forgotten this thread.
The reason the problem popped up again is probably that I recently (well... early august) upgraded my debian systems from v 12 "bookworm" to v 13 "trixie" and am still clearing up stuff from that upgrade, in particular around emacs (which has many customizations and ELPA packages and some modes from git clones, and I was using emacs 30.1 from backports on "bookworm" and switched to the main version on "trixie" (which should be identical except for the build and dependencies, but is still different...)). Anyway... having learned from past experiences I cleaned out ELPA and reinstalled the packages I needed, using the versions bundled with emacs as far as possible. But that probably means I am now running org-mode without Ihor Radchenko's patches from March 2025...? locate-library for 'org' says: Library is file /usr/share/emacs/30.1/lisp/org/org.elc I am running editorconfig from elpa, locate-library says: Library is file ~/.emacs.d/elpa/editorconfig-20250809.139/editorconfig.elc (from august on the day after the upgrade from bookworm to trixie) Doesn't look like I ever reported editorconfig-exclude-regexps not working (as I promised to do, back in March), based on my list of editorconfig issues, but I will do so now: https://github.com/issues/created?q=is%3Aissue%20archived%3Afalse%20author%3A%40me%20sort%3Aupdated-desc%20editorconfig
