Question about the S.Art! VintageSpring Guitar on PSR-S770

[Aquarius]

I really like the S.Art! VintageSpring guitar instrument sound on the PSR-S770 BUT... I have a song where I want to finish with this instrument and when I play the last note...  as I release the sustain OR the note even after holding until a full decay of the sound... I get that note replay and the sound of the fingers releasing the strings sound effect.  I just want the last note to just decay without that effect.  There are some other guitar sounds that don't have this effect, but unfortunately are not quite the sound of this one.  There are some others (like S.Art! LightChorus that is really close) that I could use but they also have this same result on the last note.

So...  is there some way to just turn off that particular effect while otherwise keeping the same overall sound of this electric guitar?