Hello,
First of all thanks again to DT for all their hard work and quick response with the hotfix!!!
This problem actually has to do with the autopilot, which is sort of temporary AI

This has occured in every mission I have tried so far. When you have a long distance between waypoints and you activate the autopilot I have noticed that about every 20-30 seconds the plane will full rudder right and sometimes turn 90 degrees then quickly back to level and climb to regain the altitude that it just lost. At first I thought it was actually trying to avoid flying through clouds but it still does it in a clear blue sky even when it is right on the line for the next waypoint. You can really see the regularity if you speed up to 8X. It occurs about every 4 seconds.
It's certainly not a game stopper but it looks really odd.