Conflicting RehearsalMarks

[Thomas Morley]

Hi,

consider the code below

\layout {
  \context {
    \StaffGroup
    \consists "Mark_engraver"
    \consists "Staff_collecting_engraver"
  }
  \context {
    \Score
    \remove "Mark_engraver"
    \remove "Staff_collecting_engraver"
  }
}

<<
  \new StaffGroup << \new Staff { \mark "foo" R1 }  \new Staff { R1 } >>
  \new StaffGroup << \new Staff { \mark "bar" R1 }  \new Staff { R1 } >>
  \new StaffGroup << \new Staff { \mark "buzz" R1 } \new Staff { R1 } >>
>>

working fine with 2.22., i.e. no warnings and three different
RehearsalMarks are printed.
With 2.23.9 I get warnings about conficting events (imho, there are no
conficts, the Mark_engraver is moved!) and only the first one, "foo"
is printed at every StaffGroup.

How to fix?

Thanks,
  Harm