grace note (first note) in a measure that follows an end of a repeat volta displays weirdly

[Kenneth Wolcott]

Hi;

grace note (first note) in a measure that follows an end of a repeat
volta displays weirdly

Lilypond 2.22.2 (Mac, homebrew, Guile 2.2)

I have lots of slashed grace notes, many of which occur at the
beginning of a measure.  I have fixed most of those by adding a grace
with a skip in the other (unspecified) voice.

  However, the first measure that follows a repeat section (without
alternatives) there is a slashed grace note that Lilypond displays in
a measure all by itself, despite my attempts to place a grace note
with a skip at the same location in a different (unspecified) voice.

Is this problem resolved by specifying voices?

What am I doing wrong here?

Please see the pdf which I am using as an example, my engraving
(partial) and my Lilypond code, all attached.

BTW, I was getting warnings/hints suggesting that I should NOT use
forced line breaks, and after disabling the forced line break, the
warnings/hints vanished.

Thanks in advance for your help,
Ken Wolcott

satie_gnoissienne1.pdf
Description: Adobe PDF document

Gnossienne_Nr1.ly
Description: Binary data

Gnossienne_Nr1.pdf
Description: Adobe PDF document