Petal engine search results was incorrect in Chinese

[Plus-xu]

Version of Searx, commit number if you are using on master branch and stipulate if you forked Searx
8a19442

How did you install Searx?
Installation scripts and executing the searx/webapp.py file

What happened?

Can't get the correct search results when using Petal in Chinese . All results are irrelevant to the keyword。

How To Reproduce

Search any Chinese with Petal

Expected behavior

The previous version showed the correct search results.

Screenshots & Logs

Additional context

[allendema]

What if you apply this patch?

https://github.com/searxng/searxng/blob/ac15c70566749798ad7b2a0945ecf93792517a99/searx/settings.yml#L1704-L1721

[Plus-xu]

What if you apply this patch?

https://github.com/searxng/searxng/blob/ac15c70566749798ad7b2a0945ecf93792517a99/searx/settings.yml#L1704-L1721

I apply this patch, but nothing changed.

For example, if I search 巧克力(chocolate）with Petal engine, The results are different (same searching language setting -ZH)

1. 8a19442 （irrelevant to the keyword）

2. 6ffa70d （relevant to the keyword）

3. Searxng ac15c705（relevant to the keyword）