subtitle moves notes off staff lines

I've noticed at times lilypond produces notes that are not exactly on or between the staff lines. I boiled it down to the attached minimum example, which shows a D flat that looks floated up about half way to E flat. However, if you comment out the header subtitle, the note lands precisely on D fla

Re: subtitle moves notes off staff lines

> I've noticed at times lilypond produces notes that are not exactly on or > between the staff lines. I boiled it down to the attached minimum > example, which shows a D flat that looks floated up about half way to E > flat. However, if you comment out the header subtitle, the note lands > precis