Ambitus + Cue gives spurious note column warning

[Richard Shann]

The combination of Ambitus and a cue seems to provoke a strange
warning:

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\version "2.22"
MvmntIVoiceI = { c'1 c'}
MvmntIVoiceII = {
                 \cueDuringWithClef #"1 Treble on Staff 1 Mvmnt 1"#1 #"treble" 
{ R1*4/4 }        
                 c1 
                }

\layout { \context {  \Voice   \consists "Ambitus_engraver" }}

\addQuote "1 Treble on Staff 1 Mvmnt 1" \MvmntIVoiceI

\score { 
          <<
            \new Staff  << 
  
                          \new Voice  { \MvmntIVoiceI } %End of voice
                        >> %End of Staff

            \new Staff   << 
                            \new Voice = "MvmntIVoiceII"  { \clef alto 
\MvmntIVoiceII }
                        >> 
          >>
       }
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which gives:

Starting lilypond 2.22.0 [Ambitus-cue-notecolumnclash.ly]...
Processing `/home/rshann/Skype/Ambitus-cue-notecolumnclash.ly'
Parsing...
Interpreting music...
Interpreting music...
Preprocessing graphical objects...
programming error: Note_column without heads and stem
continuing, cross fingers
/home/rshann/Skype/Ambitus-cue-notecolumnclash.ly:6:18: programming
error: note-column has no direction
                 
                 c1 
/home/rshann/Skype/Ambitus-cue-notecolumnclash.ly:6:18: continuing,
cross fingers

I cut this down from a much bigger score to make a MWE but in so doing
I see I have inadvertently triggered an extra warning, the first one
above about Note_column without heads and stem. The original only has
the warning about "note-column has no direction". I hope this won't
muddy the issue.

Any thoughts?

Richard Shann