Let's say I have 7 waypoints in my flightplan. I am going to create a new one, so I select waypoint 08 as my PREP, bu then sometimes my INS will display a 'corrupt' screen (all the numbers overlapping in each section) and I will be unable to create any new waypoints from that point on. The corrupt numbers go away when I exit waypoint 08 as my PREP and punch in any number under 08, but they will return when I try again.
Sometimes I get a game crash shortly after; I will attach a log file. It's late here now, but tomorrow I will try to replicate this and post screenshots.
If I am doing something wrong in the INS management and it's simply pilot error and not a bug, please let me know, thanks!