Completion engraver accidentals

[Jon Arnold]

Hi folks-

I'm using the completion engraver and completionUnit to split notes
according to meter, but the cautionary accidentals and forced accidentals
do not behave properly.

%%% example
\version "2.21.5"

\new Voice \with {
  \remove "Note_heads_engraver"
  \consists "Completion_heads_engraver"
} {
  \set completionUnit = #(ly:make-moment 1/2)
  c'4 d'?2 c'2 d'!2 c'4
}
%%% example

Any recommendations on how to fix this? Is this a bug? Also, why is that
first tie offset so much but the 2nd one looks great?

Thanks!

Jon