So. In a couple of flights, the IRU's have lost alignment, never knew about the alignment hack and just suffered haha. Anyway, this occurred last night and I believe it could be down to a conflict with the autospeed plugin which if your fps drops below 20fps it will increase the sim rate whilst its below 20fps. As you can see in the clip, I went to the external view and XP was being a meme and you can see the autospeed plugin kicking in as it had a little lag and when I jumped back into the cockpit, the IRU had lost alignment.
Thanks for your support in this matter,