TGRadioBooks
FB2 has no chapter divisions: why it imported as one chapter
If an FB2 book imports as one chapter, inspect its structure. TGRadio uses top-level section elements in the main body. Several chapters nested inside one enclosing section can therefore become a single imported division. Correct the source outside TGRadio; multiple audio fragments do not change the book's chapter structure.
Confirm that the issue is chapter division
Compare the imported opening with the FB2 in an ebook reader. Then locate the point where the next chapter should begin. If the text continues correctly but TGRadio shows one division, investigate structure. If paragraphs are missing, you also need to check the completeness of the source text.
For example, a book contains ten named chapters, but the import shows one entry bearing the book title. That does not prove nine chapters were lost. Check whether they sit inside a single enclosing section, and keep a separate working copy.
Inspect section nesting
FB2 stores the main text in a body and marks divisions with section elements. Import uses sections directly inside the main body. If there is one enclosing section with chapters nested inside it, the top level contains only one division. A reader's contents panel may still display the nested chapters.
Use an FB2 editor or an editor with a document-tree view outside TGRadio. Headings that look identical on screen can occupy different structural levels, so inspect their position in the tree.
Keep audio fragments separate from chapters
After you choose a voice and press Play, TGRadio starts preparing audio. A long division can play in smaller fragments, with later fragments prepared as you listen. These pieces support speech playback; they do not establish that the source contains separate chapters.
Do not use the number of prepared fragments to evaluate FB2 structure. Compare meaningful chapter boundaries with the original document. Waiting for more audio, pressing Play again, or changing voices will not rebuild the nesting of imported text.
Correct an editable source
If you can edit FB2, use your editor to place the intended chapters at the appropriate top level. Avoid moving every nested section automatically, since some may be subdivisions within a chapter. Check against the content and save a separate revised file.
Also respect the purpose of additional sections. Notes and comments are excluded during import, so they should not hold ordinary chapters of the main narrative. Reopen the saved FB2 in a reader and inspect the sequence, headings, and transitions around your changes.
Prepare a TXT alternative if necessary
If editing FB2 is impractical, extract the available text outside TGRadio and prepare a TXT file. Add a separate Chapter 1 line before the first chapter and Chapter 2 before the next. A list of titles at the beginning is insufficient; each marker belongs before its chapter text.
Compare the TXT with the book, particularly the start and end of each division. After import, check the chapter divisions, select a voice, and press Play for a listening check. TGRadio has no FB2 structure editor, so source corrections require importing the prepared version again.