problem with associatedVoice

[Werner LEMBERG]

At the position where Italian and German text needs a different number
of notes (see attached image), I want to use `\set associatedVoice' to
properly switch between voices.  However, it fails: the syllable `la'
(and all syllables following) is incorrectly positioned – it should be
below note `g'.  What am I doing wrong?

Please advise.


    Werner


======================================================================


\version "2.13.31"

<< \new Staff <<
     \context Voice = "german" \relative c {
       \autoBeamOff
       \clef bass
       r16 f \voiceOne f32 f \oneVoice g16 a8 a a a16 a bes8 c
     }

     \context Voice = "italian" \relative c {
       \clef bass
       s8 f16
     }
   >>

   \new Lyrics \lyricsto "german" {
     die Toch -- ter ver -- füh -- ren und ih -- ren Va -- ter
   }

   \new Lyrics \lyricsto "german" {
\set associatedVoice = "italian"
     Sfor --
\set associatedVoice = "german"
             zar la fi -- glia, ed am -- maz -- zar il
   }
>>