Annotation @JsonUnwrapped generates empty field

[Murasj]

Hi,
this bug was noticed since 2.6.0 and still exists in 2.7.0 and block update SpringBoot in my app to version 3.4.0. Problem is that I have classes like below:

@Data
public class PreferenceData {

    @Schema(
        description = "Title",
        example = "My Title"
    )
    @NotBlank
    private String title;

    @NotNull
    @Valid
    private PreferenceConfigData config;
....

@Data
public class PreferenceConfigData {

    @JsonUnwrapped
    private PreferenceConfigSection preferenceConfigSection;

}

@Data
public class PreferenceConfigSection {
//some @NotNull and @NotBlank fields
}

Finally in generated json field config is empty, it doesn't contain any fields from DashboardConfigSection.
I've tried some suggestions like
SpringDocUtils.getConfig().addParentType
or disabling springdoc.model-converters.polymorphic-converter.enabled but any of it resolve my issue.