Adding an extra staff at a line break

When adding a new staff at a line break, some extra space is unfortunately added at the end of the line before the break (to fit in a key signature change, which will never be printed anyway). The workaround is to add a setting of Staff.explicitKeySignatureVisibility as is shown in the example.

\version "2.24.0"

\paper { tagline = ##f }

\score {
  \new StaffGroup \relative c'' {
    \new Staff
    \key f \major
    c1 c^"Unwanted extra space" \break
    << { c1 | c }
       \new Staff {
         \key f \major
         \once \omit Staff.TimeSignature
         c1 | c
       } 
    >>
    c1 | c^"Fixed here" \break
    << { c1 | c }
       \new Staff {
         \once \set Staff.explicitKeySignatureVisibility = #end-of-line-invisible
         \key f \major
         \once \omit Staff.TimeSignature
         c1 | c
       }
    >>
  }
}