>Consider the following MWE:
>It produces the attached two pdf outputs. Note the font change for
>composer, poet, instrumentName, and piece in Score2, while the font
>used for those fields looks normal in Score1.
>This phenomenon seems to occur for any "book" past the first one.
>This phenomenon did not occur in v2.19.38.
>Is there a fix? Is this a bug?
Seems to be fixed in git. I think it was issue 4918.