> % acciaccatura bug
> % if used in at the beginning
> % moves timeSignature and more...
>
> \new PianoStaff {
> <<
> \new Staff \relative c'' {
> \acciaccatura b16
> c4
> }
>
> \new Staff \relative c {
> \clef "bass"
> g4
> }
> >>
> }This is the infamous LilyPond issue #34. This is documented in https://lilypond.org/doc/v2.26/Documentation/notation/special-rhythmic-concerns#grace-notes for example. Werner
