In a classical album with multiple composers and some movement-based tracks populated with “Grouping” data, single tracks without grouping data displays the composer data as the heading (see the heading of composer “David Popper” above track “Elfentanz, Op. 39”).
I feel like this is a bug. The heading for that track should be an empty line (\newline), as what’s shown below, a case where the composer data is uniform across the entire album.