new_post_name prefix works in sub post folder?

[lephones]

Check List

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• I have already read Docs page & Troubleshooting page
• I have already searched existing issues and they are not help to me
• I examined error or warning messages and it's difficult to solve
• Using the latest version of Hexo (run hexo version to check)
• Node.js is higher than minimum required version

Expected behavior

new_post_name: :year-:title.md
file path : _post/hexo/2023-hello.md (must be in sub folder)
permalink :
:title hexo/hello
:name hello

Actual behavior

i set a time prefix in post file name.prefix cant be removed in path.
permalink:
:title hexo-2023-hello
:name hexo-2023-hello

How to reproduce?

1. edit the new_post_name setting in _config.ym to add ':year-:month-:day-:title.md' prefix.
2. created a folder in _post and add a new post.
   The name and title in permalink setting is folder-date-name. (slug = title = name)
   eg.

# without year prefix
new_post_name: :title.md
post file : _post/hexo/hello.md
# permalink setting
:title hexo/hello
:name hello

# include prefix
new_post_name: :year-:title.md
post file :  _post/hexo/2023-hello.md
# permalink setting
:title hexo-2023-hello
:name hexo-2023-hello

hexo version 6.3

[lephones]

set ':year-:month-:day-:title.md' prefix in new_post_name.
create a sub-dir in _post-dir and create a md file with prefix.
the post url is /subdir-year-month-day-filename.html .
it should be /subdir/year-month-day-filename.html

the result without new_post_name is right.