Add sections to the bookbuilder: Политическое заявление, а также ретроспектива нашей работы по организации солидарности вокруг войны в Украине ( )
With complex structures, e.g., a chapter with subsections, selecting only the chapter is likely to select only the chapter's title, so probably you want to select the chapter and all its subsections.
The text structure is shown below.