The English at the end of the unordered list does not support search

Windows 2.14.20
The English at the end of the unordered list does not support search. For example, if the content of a note is - 英文搜索Test in English, it cannot be searched through test.
Please forgive my poor English, this is translated through google, please forgive me.

Welcome @BlueDolphin,
I have the same behavior with a simple text.

You could try inserting a space to separate your text and the English text.

Although adding a space can solve it, I still hope to solve it fundamentally, that is, the program code, so that it can be solved once and for all.