[NEED HELP] How to find out weird thing caused Emacs auto save scratch buffer as lot of files

[Christopher M. Miles]

Recently I found in my user home directory, has lot of files named like:

#+begin_src sh
find ~ -maxdepth 1 -iregex ".*scratch.*" -print | head -n 8
echo ""
echo "Counted files number: "
find ~ -maxdepth 1 -iregex ".*scratch.*" -print | wc -l
#+end_src

#+RESULTS[(2023-05-23 11:18:44) aeb151fa27fcf758a5339bed5dc6617cb4f731ba]:
#+begin_example
/Users/stardiviner/#%2Ascratch%2A#UKK9EL#
/Users/stardiviner/#%2Ascratch%2A#4gsYFq#
/Users/stardiviner/#%2Ascratch%2A#ufEZRq#
/Users/stardiviner/#%2Ascratch%2A#XzrExY#
/Users/stardiviner/#%2Ascratch%2A#jGa6jP#
/Users/stardiviner/#%2Ascratch%2A#mweKr5#
/Users/stardiviner/#%2Ascratch%2A#mDmbh3#
/Users/stardiviner/#%2Ascratch%2A#CTbcQ7#

Counted files number: 
     321
#+end_example

- I tried search "scratch" in my Emacs config files, not found any clue.
- I tried to check out some minor modes like auto-save, savehist, etc. Not them 
neither.
- I tried to search "scratch" in my Emacs packages installation directory 
elpa/, still not found.

Does anybody have any clue how to debug this issue quickly?

I know maybe bug-hunter can be used here, but it need to wait for Emacs
trigger this behavior randomly without knowing how long the time spend.

So I send asking help email here. Hope someone can help me. Thanks a lot!

-- 

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