SystemStartBracket and BarNumber collision

[Pierre-Luc Gauthier]

Hi there,

In the example bellow :
Why doesn't the SystemStartBracket push the BarNumber up?
Probably rather :
Why doesn't the SystemStartBracket register in the skylines?

\version "2.21.0"

\layout {
  \override Score.BarNumber.self-alignment-X = #CENTER
  \override StaffGroup.SystemStartBracket.collapse-height = #1
}
\new StaffGroup {\set Score.currentBarNumber = #300 \bar "" 4}


Of course I could raise the BarNumber.padding but that would be a work
around *and* would apply to all BarNumbers.

Thanks
-- 
Pierre-Luc Gauthier

BarNumberStaffGroup-01.png
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BarNumberStaffGroup-01.ly
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