Yes I got confirmation from NI that it is fixed. I sent them a dump file that I was able to generate by running Maschine under some debugging tools and that helped them narrow it down. Memory related crashes can be very hard to find since they only show up under very specific circumstances and can sometimes crash in completely unrelated code. In this case I was lucky to be able to capture a dump file that helped pinpoint the problem.
NI was very diligent in following up with us on this issue and I am glad that there is a resolution.