\revertBeamSettings not reverting

[address@hidden]

In the example below the second used of \revertBeamSettings appears to have no 
effect.  Have I missed something in the docs or should I send this to 
bug-lilypond?

-David


%%%%% BEGIN LILYPOND %%%%%

\version "2.13.17"

\score {
  \relative c' {
    \time 3/8
    c16 c c c c c % default beam
    \overrideBeamSettings #'Staff #'(3 . 8) #'end #'((* . ( 1 1 1)))
    c16 c c c c c % overridden beams 2+2+2
    \revertBeamSettings #'Staff #'(3 . 8) #'end
    c16 c c c c c % back to default beam
    \overrideBeamSettings #'Staff #'(3 . 8) #'end #'((* . ( 1 1 1)))
    c16 c c c c c % overridden again 2+2+2
    \revertBeamSettings #'Staff #'(3 . 8) #'end
    c16 c c c c c % NOT default beams as above
    
  }
}

%%%%% END LILYPOND %%%%%