bug#45915: 28.2; delete-char deletes two letters

[Tak Kunihiro]

I confirmed that delete-char still deletes two letters on
emacs-version: 28.2, org-version: 9.5.5.

I found out (org-table-align) in (org-table-copy-down) makes
this situation.

Can someone take a look (org-table-align)?

TIA

#+begin_src emacs-lisp
(defun emacs-bug-reproduce-45915 ()
  "Reproduce bug#45915."
  ;; (gnus-read-ephemeral-emacs-bug-group 45915)
  (interactive)
  (with-current-buffer (get-buffer-create "*temp buffer*")
    (erase-buffer)
    (require 'org)
    (orgtbl-mode 1)
    (insert (format "emacs-version: %s, org-version: %s\n" emacs-version 
org-version))
    (insert "| 1 |"))
  (switch-to-buffer-other-window "*temp buffer*")
  (execute-kbd-macro (kbd "M-< C-n C-f C-f"))
  (message "I will call #'org-table-copy-down.")
  (sit-for 2)
  (call-interactively #'org-table-copy-down)
  (sit-for 2)
  (message "I will hit <delete>.")
  (sit-for 2)
  (execute-kbd-macro (kbd "<delete>"))
  (message "Two letters were deleted unexpectedly."))
;;; (call-interactively 'emacs-bug-reproduce-45915)
#+end_src