Strange error from \new Voice

[Bernhard Kleine]

I have the following extract from Mendelssohn Bartholdy. I noticed that
the parentheses in measure seven were not respected and the text was
wrongly applied. When eleminating the line "  \new Voice = "SII" {
\voiceTwo \SopranoVoiceII }" the text was correct. Please can you
explain and propose a remedy?

Thank you!

\version "2.20.0"
\language "deutsch"
\header {
  title = "Der 100. Psalm"
  tagline = "Bermhard Kleine 2020"
}
\paper {
  #(set-paper-size "a4")
}
\layout {
  \context {
    \Voice
    \consists "Melody_engraver"
    \override Stem #'neutral-direction = #'()
  }
 }
global = {
  \key c \major
  \time 4/4
  \autoBeamOff
}
SopranoVoiceI = \relative c'' {
  \global
  \dynamicUp
  g2\f g4 g | c2 c4 d | e1\fermata g,4 g8 g a4 g | f2 e |
  c'4 c8 c c4 c | c (d) e c | h a g h | e2. (d4~| d ) c2 c4 | c1 |
h2.\fermata
}
VerseSopranoVoiceI = \lyricmode {
  Jauch -- zet dem Herrn al -- le Welt! Die -- net dem Herrn mit Freu --
den.
  Die -- net dem Herrn mit Freu -- den, kommt vor sein An -- ge -- sicht
mit Froh -- lok -- ken.
  Er -- ken -- net,
}
SopranoVoiceII = \relative c'' {
  \global
  \dynamicUp
  % Die Noten folgen hier.
  s1*11
}
Soprano = \new Staff \with {
  instrumentName = "Sopran"
} <<
  \new Voice = "SI" { \voiceOne \SopranoVoiceI }
  \new Voice = "SII" { \voiceTwo \SopranoVoiceII }
  >>
  \addlyrics { \VerseSopranoVoiceI }
\score {
  <<
    \Soprano
  >>
  \layout { }
}

-- 
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