Question on cross-staff

[Paolo Prete]

Hello.

Please look at the snippet below. A cross-staff behavior would be obtained
with the "\change Staff" command. But given that this method is very buggy
(not in this case, but in many other situations), I wonder if it can
bypassed by adding "fake" stems on the rests on the upper staff (and then
hide the rests), so that the stems on the lower staff can connect to them
with the "\crossStaff" command.

Any idea of how to make this?

Thank you!
Best
P

%%%%%%%%%%%%%%%%%%%%%%
\version "2.19.84"

\layout {
  \context {
    \PianoStaff
    \consists #Span_stem_engraver
  }
}

{
  \new PianoStaff <<
    \new Staff {
      c'8^[ r r c']
    }
    \new Staff {
      \voiceOne
      \autoBeamOff
      \crossStaff { \autoBeamOff s8 c' c' s }
    }
  >>
}