Practiced this song a few weeks ago again, I tried using 2 fingers on the same fret for the pinch harmonic note. There's only one?
Noticed I wasn't holding the notes good enough when I try to do them ( releasing them too early )
The index I used for fret hand mute hovering over 3 strings
This helped me but I still need to work on my technique and maybe I won't need to use 2 fingers on 1 fret