Aligning lyrics when music portion is polyphonic

[Alberto Simões]

Hello

In a music I am transcribing there is a portion where I had to force two
voices with

  << { ... } \\ { ... } >>

Now my problem is that lyrics in that part of the music are not shown.

Is there any tweak to solve this issue?

Thank you
Alberto
-- 
Alberto Simões - Departamento de Informática - Universidade do Minho
                 Campus de Gualtar - 4710-057 Braga - Portugal