Re: [BUG] org-save-all-org-buffers reapplies startup visibility [9.5 (release_9.5 @ /usr/local/share/emacs/29.0.50/lisp/org/)]

[No Wayman]

Your analysis is correct. I looked into this a couple days ago.
See the following message for an explanation and a patch (testing 
appreciated):

https://list.orgmode.org/87zgrmc2rg....@gmail.com/T/#m9888bc09d77d7bba70ba99671aca72446c4d41b9