lyric in false voice by temporary polyphonic notation

[astrid]

Hallo,

in the german forum for lilypond ->
https://lilypondforum.de/index.php/topic,667.0.html

I asked for a solution, but got no answer. It is a bug, I suggest; see here:

If I write (an it's the same in \version "20.21.0"):

|\version "2.20.0" sv = \relative c'' {   c1   << { \voiceOne a2 g4 g }
\new Voice { \voiceTwo c,4 b c c } >>   \oneVoice   e1 } vers =
\lyricmode {   a b c d e f } \score {   \new Staff { \sv }   \addlyrics
{ \vers }   \layout { } }|


Then I get:



For any solution I would grateful …

kind regards
Dieter Reiser