If I run org-tree-to-indirect-buffer twice with a prefix argument, I get a
buffer that's too narrow and omits the text of the last heading in the
tree. In this state, tree operations can result in data loss.

To reproduce, open a file containing the following data:

* I
** A
** B
* II

Follow these steps:

1. S-tab to fold everything.
2. With point on the "I" heading, C-u C-c C-x b to open an indirect buffer.
3. With point on the "I" heading in the new buffer, C-u C-c C-x b to open
another indirect buffer.

The buffer created in step 3 will look like:

* I
** A
**

Note that the text "B" is missing from the last heading. Expected behavior
is

* I
** A
** B

4. With point on the last, blank heading in the buffer created in step 3,
M-up to move the heading. The heading will disappear, resulting in:

* I
** A

If you write the file, it will look like this:

* I
** A
B
* II

Expected behavior from steps 1-4 is:

* I
** B
** A
* II

I can reproduce on both the version of org that shipped with emacs 27.2,
and with the gnu elpa package.

Emacs  : GNU Emacs 27.2 (build 1, x86_64-pc-linux-gnu, GTK+ Version
3.24.20, cairo version 1.16.0)
 of 2021-11-04
Package: Org mode version 9.5.1 (9.5.1-g36086a @
/home/nisan/.emacs.d/elpa/org-9.5.1/)

current state:
==============
(setq
 org-src-mode-hook '(org-src-babel-configure-edit-buffer
    org-src-mode-configure-edit-buffer)
 org-link-shell-confirm-function 'yes-or-no-p
 org-metadown-hook '(org-babel-pop-to-session-maybe)
 org-clock-out-hook '(org-clock-remove-empty-clock-drawer)
 org-mode-hook '(#[0 "\300\301\302\303\304$\207"
  [add-hook change-major-mode-hook org-show-all append local]
  5]
#[0 "\300\301\302\303\304$\207"
  [add-hook change-major-mode-hook org-babel-show-result-all
   append local]
  5]
org-babel-result-hide-spec org-babel-hide-all-hashes)
 org-archive-hook '(org-attach-archive-delete-maybe)
 org-confirm-elisp-link-function 'yes-or-no-p
 org-agenda-before-write-hook '(org-agenda-add-entry-text)
 org-metaup-hook '(org-babel-load-in-session-maybe)
 org-bibtex-headline-format-function #[257 "\300 \236A\207" [:title] 3
"\n\n(fn ENTRY)"]
 org-babel-pre-tangle-hook '(save-buffer)
 org-tab-first-hook '(org-babel-hide-result-toggle-maybe
     org-babel-header-arg-expand)
 org-agenda-loop-over-headlines-in-active-region nil
 org-occur-hook '(org-first-headline-recenter)
 org-cycle-hook '(org-cycle-hide-archived-subtrees org-cycle-hide-drawers
 org-cycle-show-empty-lines
 org-optimize-window-after-visibility-change)
 org-speed-command-hook '(org-speed-command-activate
 org-babel-speed-command-activate)
 org-export-before-parsing-hook '(org-attach-expand-links)
 org-confirm-shell-link-function 'yes-or-no-p
 org-link-parameters '(("attachment" :follow org-attach-follow :complete
org-attach-complete-link)
      ("id" :follow org-id-open)
      ("eww" :follow org-eww-open :store org-eww-store-link)
      ("rmail" :follow org-rmail-open :store
org-rmail-store-link)
      ("mhe" :follow org-mhe-open :store org-mhe-store-link)
      ("irc" :follow org-irc-visit :store org-irc-store-link
:export org-irc-export)
      ("info" :follow org-info-open :export org-info-export
:store org-info-store-link)
      ("gnus" :follow org-gnus-open :store
org-gnus-store-link)
      ("docview" :follow org-docview-open :export
org-docview-export :store org-docview-store-link)
      ("bibtex" :follow org-bibtex-open :store
org-bibtex-store-link)
      ("bbdb" :follow org-bbdb-open :export org-bbdb-export
:complete org-bbdb-complete-link :store
org-bbdb-store-link)
      ("w3m" :store org-w3m-store-link) ("file+sys")
      ("file+emacs") ("shell" :follow org-link--open-shell)
      ("news" :follow
#[514 "\301\300\302 Q \"\207"
 ["news" browse-url ":"] 6 "\n\n(fn URL ARG)"]
)
      ("mailto" :follow
#[514 "\301\300\302 Q \"\207"
 ["mailto" browse-url ":"] 6 "\n\n(fn URL ARG)"]
)
      ("https" :follow
#[514 "\301\300\302 Q \"\207"
 ["https" browse-url ":"] 6 "\n\n(fn URL ARG)"]
)
      ("http" :follow
#[514 "\301\300\302 Q \"\207"
 ["http" browse-url ":"] 6 "\n\n(fn URL ARG)"]
)
      ("ftp" :follow
#[514 "\301\300\302 Q \"\207" ["ftp" browse-url ":"]
 6 "\n\n(fn URL ARG)"]
)
      ("help" :follow org-link--open-help)
      ("file" :complete org-link-complete-file)
      ("elisp" :follow org-link--open-elisp)
      ("doi" :follow org-link--open-doi))
 org-link-elisp-confirm-function 'yes-or-no-p
 )