Switch size changes with staff space settings does not affect styles individually
The switch "size changes with staff space settings" toggles a number of text styles simultanously.
If you change the setting for header than size of footer, lyrics, tempo and others change at tha same time.
Same happens for lyrics, footer, .. I did not try all of them.
The tilte text styles like title, subtitle, composes and lyricist seem to work as they should.