I placed a Tomcat at nellis, took off climbed to 6000 and leveled off.
Replayed the track:
Tomcat takes off, nose dives into the ground and cartwheels to a stop.
Play it a second time:
Tomcat takes off, climbs to 15,000 ft, then nose dives, track ends mid decent.
These are not complex files. Any insight into this?