Guitar chord mode no longer produces MIDI file with chords

[David Bellows]

In the versions of Lilypond I've used up through 2.19.16 when I would
compile the attached file the resulting MIDI file would play the
entire chord. With 2.19.17 now only the root note is played. I don't
really know where to look for this kind of information but I can't
tell if this is the new expected result or a bug. In any case I'd like
to get the full chords back if possible.

Thanks.

Classical_guitar_Simple_Guitar_Chords.ly
Description: Text Data