Bug in connected arpeggio brackets with layout-set-staff-size

[Davide Liessi]

Hi all.
The size and position of the bracket in the second score are not
computed correctly.
Apparently the bracket is not scaled; if you use, say, 10 instead of
17 it becomes clearer.

\version "2.19.84"
music = \new PianoStaff \with {
  connectArpeggios = ##t
  \override Arpeggio.stencil = #ly:arpeggio::brew-chord-bracket
} <<
  \new Staff {
    \clef "treble"
    c'4\arpeggio
  }
  \new Staff {
    \clef "bass"
    b,4\arpeggio
  }
>>
\score {
  \music
}
\score {
  \music
  \layout {
    #(layout-set-staff-size 17)
  }
}

Is there any workaround?
Should this be added to the tracker?

Best wishes.
Davide