NoteColumn interleaves with KeySignature of other Staff

[Thomas Morley]

With the following code the first note of line two of the upper stave
interleaves with the KeySignature of the lower stave.

<<
  \new Staff { c''1 \break c''1 }

  \new Staff {
      \key ces \major
      % wrong output with:
      R1*2
%      % wrong output with:
%      s1*2
%      % correct output with:
%      \repeat unfold 2 r1
    }
>>

Same behaviour with all tested versions i.e.:
"2.12.3"
"2.14.2"
"2.15.40"
"2.16.0"
"2.17.0"
"2.17.2"

Perhaps similiar to Issue 2655.
Quoting David Kastrup:
"The problem is [...] the absence of a note column."

Regards,
  Harm

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