ColumnControl searchList doesn't see Unicode

Storms_LV

DataTables 2.3.7,
ColumnControl 1.2.1,
Bootstrap 5.3.8

When searchList collects options from a column containing localized text (UTF8), it converts all localized characters to the corresponding Latin letter. But search is running correctly.
There is no such problem if the options are passed from the server side with ajax.
I tried different columns.type options - 'string-utf8', 'html-utf8' - nothing changes.

Here is an example of what it looks like:

Here is an example of ajax data: