Musesounds classical guitar sounds

I really like the musesounds classical guitar. A guitar friend not on these forums has flagged a glitch that bugs him. I was able to reproduce it.

The sound of D5 (10th fret first string) has a gliss when played from the B below it, but not from other notes. It depends on the speed of the music (though not the note value). See exaple. If it goes slow enough there is no gliss up to the D.

It's quite noticeable. Do I report these things on github?