\version "2.24.2"

\pointAndClickOff

melody = \relative c' {
  \repeat unfold 4 { c4 d e f }
  \cadenzaOn
  \repeat unfold 4 { c,4 c c c }
  \cadenzaOff
  \bar "||"
  \break
  R1*5  % the MMRest causes this
}

\score {
  \relative {
    \compressMMRests
    \melody
  }
}