Hairpin offset when broken

[Andrew Bernard]

I am trying to offset a hairpin that is broken across lines. It appears that only the second part is affected. What’s wrong here?

Andrew

— snip

\version "2.19.35"

treble = {

  \clef treble

  \time 4/4

  c'' c'' c'' c'' c'' c'' c'' c'' \break

  c'' c'' c'' c''

}

bass = {

  \clef bass

  \time 4/4

  c^\< c c c c \f

  \override Hairpin.Y-offset = #-4

  c c^\< c c c c\ff c

}

\score {

  \new PianoStaff

  <<

    \new Staff \treble

    \new Staff \bass

  >>

  \layout {}

}

— snip