Note Off Anticipation

Could someone help me to understand why this happens (short screencast)?

http://screenr.com/Gs1N

When I press stop, it is, sometimes, antecipating the next note Note Off in Kontakt and both Note On and Note Off in MIDI-OX. Has someone detected it before?

Thanks

I’ll bump it once, could anyone help me to understand this note off anticipation?

Thanks