Custom Music font doesn't scale with staff

[Yentl Tijssens]

Hello,
I use the custom font Beethoven. Even though I have all the correct sizes 
installed, the font doesn’t use the right one when changing the default size:
Doesn’t anyone have a solution to this?

\version "2.22.2"
#(set-global-staff-size 12)
\paper {
  #(define fonts
     (set-global-fonts
      #:music "beethoven"
      #:brace "beethoven"
      ))
}
\score {
  \relative c' {  c4 d e2 }
}

beethoven-master.zip
Description: Zip archive