SystemStart changes after stop/startStaff - how to get it back

[Thomas Morley]

Hi,

consider the following code:


mus = \new Staff { R1 \break R \stopStaff s \startStaff R \break R \break R }

\new StaffGroup
  \with {
      systemStartDelimiterHierarchy =
        #'(SystemStartBracket (SystemStartBrace a b c))
  }
  << \mus \mus \mus >>


The SystemStartBrace vanishes after stop/startStaff.
I'm at a loss here, it does not work out of the box for every version
from 2.12.3 up to master.

Any chance to get the additional SystemStartBrace back?

Cheers,
  Harm