Just to circle around, I spoke with DSI support (Carson Day) and he was able to confirm that what I'm hearing happens on his test P12 (so it's not just a problem with my hardware/hearing).
He's added the item to the P12 bug list, to be reviewed at some point in the future.
The workaround at this point is to add a slight attack to the VCA envelope. Not a great solution for some situations but that's where things stand.