time engraved twice when starting with an acciaccatura

[Frank lein]

% resulting pdf not OK: time (=5/4) is engraved twice, 
%        the 'b' at different positions for the staffs
%        the acciaccatura between the two time

\version "2.12.3"

voiceA =        { \relative g' {                  a4 } }
voiceBwithAcc = { \relative b, { \acciaccatura d8 d4 } }

\score {
        \new PianoStaff <<
                \new Staff { \time 5/4 \key d \minor \voiceA }
                \new Staff { \time 5/4 \key d \minor \clef bass \voiceBwithAcc }
        >> % EndePino staff
}


% without \acciaccatura ... everthing is OK     
voiceB =  { \relative b, { d4 } }

\score {
        \new PianoStaff <<
                \new Staff { \time 5/4 \key d \minor \voiceA }
                \new Staff { \time 5/4 \key d \minor \clef bass \voiceB }
        >> % EndePino staff
}