In the current docs for v2.25.23, the link
http://lilypond.org/doc/v2.25/Documentation/internals/all-layout-objects
brings me to section 3.1 i.e Backend > All layout objects
If I hover over the '3.1.19 Beam' link, Firefox 115.19.0esr shows me
http://lilypond.org/doc/v2.25/Documentation/internals/beam
If I then click on the '3.1.19 Beam' link, Firefox doesn't take me to
http://lilypond.org/doc/v2.25/Documentation/internals/beam
but rather to
http://lilypond.org/doc/v2.25/Documentation/internals/internal-backend-properties.html#beam
which is the entry for 'beam' in section 3.4
The same error at the bottom of section 3.2.15 breaks the link loop.
This seems to happen for only the following grobs:
Beam Dots Flag Footnote InstrumentName Rest Slur Stem Tie
The docs for v2.24.4 don't have this problem.
Cheers,
Robin