Problem keeping acciaccatura slur connected to top note of a chord

[Steve Carlock]

Any ideas what I'm doing wrong?  I see the same behavior in both 2.24.4 and
2.25.6.

%%%%%
\version "2.24.4"
%\version "2.25.6"
\language "english"

\fixed c' {
  \slurUp
  \acciaccatura d'8 < g c' e' >1
  \acciaccatura d'8 < g c' e' >1
  \slurNeutral
  \slurUp
  \acciaccatura d'8 < g c' e' >1
  \once \override Slur.direction = #UP \acciaccatura d'8 < g c' e' >1
}
%%%%%

Thanks in advance for any assistance.
 -steve carlock

test1.pdf
Description: Adobe PDF document