Excess guitar harmonics in Dorico playback

I love guitar harmonics in Dorico because they play back as harmonics. However, one or two bars don’t work correctly.

In measure #63 the harmonic is correctly played and indicates in the properties panel.
In measure #64 the “e” is not a harmonic, nor is the “f#” or “a” in measure 64. None of these notes have the harmonic property set yet playback as harmonics. In fact, everything plays as harmonics until the D in bar 66.

Score attached.
CarolLukeSourceOfAll.dorico (2.1 MB)

(I’m not relying on the note head shape to indicate the harmonic at least not to Dorico, But I’m pleased to find the xml importer does recognize those shapes and sets the harmonic property).

I’m using NotePerformer but I’m assuming NotePerformer just does what it’s told by Dorico

What have I done wrong?

The basic problem is that you have harmonic and non-harmonic notes playing at the same time. The harmonic and non-harmonic notes are different sets of samples, so to do this in Dorico you need to enable independent voice playback in Play mode.