`org-capture' loads all the files in `org-directory'

[Noel Errenil]

Hello, org community

I ran into the titled issue and haven't found any solution or explanation:

First, I start Emacs and there are just a few buffers such as *scratch* and
*Messages*.

Then, I fire `org-capture', captur a note and `C-c C-c' to save the captured
content.

Suddenly all the files under ~/projects/org will be loaded into the buffer
list, which confuses me so much. Those that have nothing to do with
capturing or capture-templates are loaded into Emacs, which makes
little sense to me.

I'm running Emacs 28.1 on (Gentoo) Linux. I can reproduce this on my
macOS too.

Currently I have `org-directory' set to `~/projects/org'. My
`org-capture' config is as follows:

;; vars
(with-eval-after-load 'org
  (setq-default fill-column 80)
  (setq
   org-deadline-warning-days 0
   org-startup-folded 'content
   org-hide-leading-stars t
   org-agenda-include-diary t
   org-src-fontify-natively t
   org-src-preserve-indentation t
   org-edit-source-content-indentation 0
   org-indent-indentation-per-level 1
   org-directory "~/projects/org"
   org-agenda-files (concat org-directory "/agenda.org")
   org-default-notes-file (concat org-directory "/notes.org")))

;; org-capture templates
(setq org-capture-templates
      '(("t" "Tasks")
        ("td" "With Dealines" entry     ; todos->deadline
               (file+headline "tasks.org" "Deadlines")
               "* TODO %? %^G\nDEADLINE: %T" :kill-buffer t :prepend t)
        ("ts" "Scheduled" entry         ; todos->scheduled
               (file+headline "tasks.org" "TODOS")
               "* TODO %? %^G\nSCHEDULED: %T" :kill-buffer t :prepend t)
        ;; memos
        ("m" "Memo" entry
         (file+headline "memo.org" "MEMO")
         "* %? %^G\n%U" :kill-buffer t :prepend t)
        ;; notes
        ("n" "Daily Notes" entry
         (file+headline "notes.org" "NOTES")
         "* %? %^G\n%U" :kill-buffer t :prepend t)
        ;; readings
        ("r" "Readings")
        ("ra" "Article" entry
         (file+headline "readings.org" "ARTICLE")
         "* TODO %^{Short title for heading} %^G \nTTL: %^{Long title}
\nSRC: %^{Link} \n%u \nSUM: %^{Quick note?}"
         :kill-buffer t)
        ("rb" "Book" entry
         (file+headline "readings.org" "BOOK")
         "* TODO %^{Short title for heading} %^G \nTTL: %^{Long title}
\nSRC: %^{Link} \n%u \nSUM: %^{Quick note?}"
         :kill-buffer t)))

I just expect that only the capture template will be loaded during capturing
and the template buffer should be killed (as config-ed) after capturing.

What am I doing wrong? Any advice? Thank you so much in advance.