\cueClefUnset problem

[Menu Jacques]

Hello folks,

In the following code, I get the bass clef twice before the 6/8 time signature. The problem only arises when the parallel music containing the new CueVoice is directly followed by a \clef command.

Uncommenting the "\once\omit Staff.Clef » command before \clef "bass" removes two clefs actually…

Any hint is welcome!

JM

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\version "2.19.22"

\relative {
  \time 5/4

  r4 r4
  <<
    {
      s4 s2
      \cueClefUnset
    }
    \new CueVoice {
      \set instrumentCueName = \markup{
        \bold \concat {
          \larger "1" \raise #0.5 "ère" " " \larger "Fl."
        }
      }
      \cueClef "treble"
      \stemDown
      b'16 \p \> [ b b b ]
      \bar "!"
      c!8 -. [ c32 c c c ]
      \!
      cis8 -. [ cis32 cis cis cis ]
    }
  >>
  | % 81
  \bar "||"
  \break

  %\once\omit Staff.Clef
  \clef "bass"
  \time 6/8 | % 81
  g,8 \pp -. [ g8 -. ] r8 d'8 -. [ d8 -. d8 -. ] | % 82
  c4*5 | c4*5 c4*5 |
  \bar "|."
}

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