Setting SystemStartBracket style to 'brace failing

[Thomas Morley]

Hi,

consider the following code:

mus =
  \relative c''
    <<
      \new Staff { c1 }
      \new Staff { c1 }
    >>

\new StaffGroup
  \with {
    \override SystemStartBracket #'style = #'brace
  }
  \mus

\new StaffGroup
  \with {
    \override SystemStartBracket #'style = #'bar-line
  }
  \mus

\new StaffGroup
  \with {
    \override SystemStartBracket #'style = #'line-bracket
  }
  \mus

\new StaffGroup
  \with {
    \override SystemStartBracket #'style = #'bracket
  }
  \mus

The style-override for 'brace results in _not_ printing a
SystemStartBrace or anything, while all other settings work (image
attached).
This happens for every version since 2.14.2
It worked for 2.12.3, thus the ancient syntax (image attached).

I'm aware I can get a brace by setting systemStartDelimiter
accordingly, though above is a minimal boiled down from a larger
custom coding, where this currently failing override is needed.

Cheers,
  Harm

system-start-brace-2-12-3.png
Description: PNG image

system-start-brace-2-20.0.png
Description: PNG image