\tocItem without PDF bookmark unless adding \table-of-contents

[Stephan Schöll]

Hi folks

Based on LilyPond Changes: LilyPond — Changes 
<cid:part1.O2SfkTBQ.bp1PLoGJ@gmx.ch> (2.22)

 * PDF bookmarks are now supported and allow for|\tocItem|entries to
   appear in the ‘table of contents’ panel of PDF viewers that support it.

I would expect the following code to generate PDF bookmarks 
independently of a \table-of-contents TOC, so that I can easily jump 
from section to section when reading the sheet in my score reader 
(MobileSheets i.e.). Unfortunately neither Adobe Reader nor PDF24 Reader 
show bookmarks.

\version "2.25.29"

%\markuplist \table-of-contents

\score {
  \relative c' {
    \sectionLabel "Intro"
    \tocItem \markup "Intro"
    \repeat unfold 4 {
      c d e d
    }
    \break
    \sectionLabel "Verse"
    \tocItem \markup "Verse 1"
    \repeat unfold 4 {
      e f g f
    }
    \pageBreak
    \sectionLabel "Chorus"
    \tocItem \markup "Chorus"
    \repeat unfold 4 {
      g a c a
    }
  }
}

Is there anything that I've missed so far?

Outlook: I already have a music function called \namedSection that adds 
a \tocItem alongside with  a \sectionLabel, so that the PDF bookmarks 
should represent the structure of the score - but with no PDF bookmarks 
added so far :-(

Workaround: Yes, I could simply add a \table-of-contents at the end of 
the score for technical reasons. But I'd like to avoid this since I 
don't need it from my user perspective.

TIA

Stephan