maven-jaxb2-plugin replaces Cyrillic characters in quotation marks with unicode character codes

I use the plugin

<groupId>org.jvnet.jaxb2.maven2</groupId>
<artifactId>maven-jaxb2-plugin</artifactId>
<version>0.14.0</version>

To generate java classes from an xsd schema, some schemas contain Cyrillic characters:

<xs:attribute name="наим"

And the plugin generates the following code:

@XmlAttribute(name = "\u041d\u0430\u0438\u043c", required = true)
    protected String наим;

That is, the plugin incorrectly translates only what is enclosed in quotation marks(I suspect that the problem may not be in the plugin itself, but I'm not sure). It is necessary that the characters enclosed in quotation marks are also correctly stored. The encodings are the same everywhere: UTF-8. Setting the parameter <encoding>UTF-8</encoding> does not change anything in the plugin configuration. Java version: 14. Thank you in advance!