You’re talking about Neo Soul Keys. Just mentioning it to help googlers having the same issue find this thread.
I can’t reproduce this issue here. Try downloading Halion Sonic SE 3, then applying the latest update:
Use the same email you used to create your MySteinberg account.
This should update the playback engine used by Neo Soul Keys, which should hopefully fix this issue. As a bonus, the update will also fix some tuning issues that affected some Halion Sonic SE presets.