Nested analysis brackets order and distance issue

[Lib Lists]

Hi everybody,
In this example, everything looks fine when there are max. 3 nested
analysis brackets (first score). However, when the brackets are 4 the
distance between them is irregular.

Moreover, how to reverse the order of the brackets so that the
shortest ones are closer to the staff?

Thanks for any help,
Lib

\version "2.25.19"

\score {
  \relative c' {
    \time 4/4
    c4\startGroup\startGroup\startGroup c \stopGroup c \stopGroup c\stopGroup
  }
  \layout {
    \context {
      \Voice
      \consists Horizontal_bracket_engraver
    }
  }
}

\score {
  \relative c' {
    \time 4/4
   c4\startGroup\startGroup\startGroup\startGroup c \stopGroup c
\stopGroup c\stopGroup c\stopGroup
  }
  \layout {
    \context {
      \Voice
      \consists Horizontal_bracket_engraver
    }
  }
}