Bug in lyrics placement in mensural music?

[Phil Holmes]

The code below produces the image attached.  As can be seen, using a 
StaffGroup with mensural staves places the lyrics above the top stave, and I 
can't find an over-ride that gets them in the proper place.  I _think_ this 
must be a bug, but wondering if anyone knows better?

\new StaffGroup {
 <<
   \new MensuralStaff
   {
     \new MensuralVoice = melody \relative c'' { c4 c c c }
   }
   \new Lyrics \lyricsto melody \lyricmode { Lyrics can contain markup }

   \new MensuralStaff
   {
     \new MensuralVoice = lower \relative c'' { c4 c c c }
   }
   \new Lyrics \lyricsto lower \lyricmode { Some lower words here }
 >>
}

{  <<
   \new MensuralStaff
   {
     \new MensuralVoice = melody \relative c'' { c4 c c c }
   }
   \new Lyrics \lyricsto melody \lyricmode { Lyrics can contain markup }

   \new MensuralStaff
   {
     \new MensuralVoice = lower \relative c'' { c4 c c c }
   }
   \new Lyrics \lyricsto lower \lyricmode { Some lower words here }
 >>
}

\new StaffGroup {
 <<
   \new Staff
   {
     \new Voice = melody \relative c'' { c4 c c c }
   }
   \new Lyrics \lyricsto melody \lyricmode { Lyrics can contain markup }

   \new Staff
   {
     \new Voice = lower \relative c'' { c4 c c c }
   }
   \new Lyrics \lyricsto lower \lyricmode { Some lower words here }
 >>
}



--
Phil Holmes

LyricTest2.png
Description: PNG image