I've been so busy with projects that I haven't been able (or willing!) to do any software updates since I first posted about this issue. I'll update around end of the year and check to see if the issue still exists.
It is 100% reproducible & consistent for me though, but the upside is that I know how to work around it... all I have to do is set the VE Pro buffers to "none" when I bounce and everything's fine. The problem though is that my template has 14 instances of it, so that gets to be a chore...