Undo-Tree discarding undo history: "No further undo information"

[maptv]

Description

Undo-Tree discarding undo history leads to "No further undo information" message.

I cannot get persistent undo to work consistently in spacemacs.
Here is a link to my config: https://github.com/maptv/setup/blob/main/.spacemacs
I am installing in the typical location (.emacs.d).
I tried re-installing Spacemacs with different Emacs versions.
I have tried all sorts of undo settings, but took them all out of my config because nothing was working.

Reproduction guide 🪲

1. Start Emacs with my config: https://github.com/maptv/setup/blob/main/.spacemacs
2. Open a file
3. Make a change
4. Exit the current session
5. Start a new session
6. Press u

Observed behaviour: 👀 💔

The message "No further undo information" is displayed.

By pressing SPC w p m, I find this error:

Buffer has been modified since undo-tree history was saved to
	  "~/.emacs.d/.cache/undo-tree-history/.!Users!uname!uname!repo!.file.~undo-tree~"; could not load undo-tree history

I believe this error means that Undo-Tree has missed a beat and gave up completely.
Is there some way to ensure that this never happens?
Hooks that save/load undo history when closing/opening a file?

Expected behaviour: ❤️ 😄

Press u in normal state to undo the most recent change.

System Info 💻

• OS: darwin
• Emacs: 28.2
• Spacemacs: 0.999.0
• Spacemacs branch: develop (rev. 26629bf)
• Graphic display: nil
• Running in daemon: nil
• Distribution: spacemacs
• Editing style: vim
• Completion: helm
• Layers:

(vimscript lua auto-completion emacs-lisp evil-snipe git helm markdown multiple-cursors osx version-control treemacs)

• System configuration features: ACL GMP GNUTLS JSON LIBXML2 MODULES NOTIFY KQUEUE PDUMPER THREADS ZLIB

Backtrace 🐾

Buffer has been modified since undo-tree history was saved to
	  "~/.emacs.d/.cache/undo-tree-history/.!Users!uname!uname!repo!.file.~undo-tree~"; could not load undo-tree history