virtual sampler MIDI notes 'sticking'

[jptrivers]

We are having issues with 'sticking' notes with one of our virtual sampler players, Philharmonik (IK Multimedia), i.e., when an instrument is in midi and I start/stop the track, random notes will stick and continue looping indefintely.

No other virtual samplers or plug-in players (e.g. Kontakt, Indigo) behave this way.

Is there a ProTools MIDI preference or something else that should be changed?

Actions required to reproduce the problem:
Start/Stop any midi track that is running an instrument in Philharmonik.

Troubleshooting already attempted:

I have selected the ProTools midi clock and checked all boxes that apply.
I have tried increasing the playback engine buffer, but the problem still exists.
I have contacted IK Multimedia numerous times but to no avail.

Thanks for any help offered!


Our System:

ProTools TDM 6.9.1
192 i/o - HD2 cards
PowerMac G4 dual 1.25 gig mirror door 2gig ram
OS 10.3.8
Emagic Unitor8 midi interface