Hi! AFAICS org-open-at-point is broken in the case when point is on a headline: org-open-at-point does not open any link.
I checked the older version 0c00590606325e6f6f4756f567e36c074da0e890 and I think it's okay. Branch main. Thanks! Emacs : GNU Emacs 30.0.50 (build 23, x86_64-pc-linux-gnu, GTK+ Version 3.24.34, cairo version 1.16.0) of 2023-02-01 Package: Org mode version 9.6.1 (release_9.6.1-208-g0c0059 @ /home/b/s/org/org-mode/lisp/) -- Marco Wahl
