Thanks RSR for this update, nice to see your efforts after release to help people who have these kind of issues.
Regarding PAUSES, for my case:
I had already this particular point with the NGX (it happened a few times some months after I installed it). It's really a PAUSE, the simulator stops working , and it is ALWAYS during 8 minutes (not less, not more). It was happening really randomly and stopped to happen without doing anything.
When I have installed the 777-200LR the issue happened again, still 8 minutes, and the simulator always continues working on after this pause. What I have done is set my FSX settings a little bit lower, For the time being it did not happened any more, finger crossed.
I have also seen some topics on other forums which are called "8 minutes freeze" but unsolved yet, and note that what I've read was not concerning especially PMDG products.