Unfortunately, update 1.13.16.0 did not fix the Citation Longitude Auto Pilot side to side Oscillation at altitudes starting around 30k and gets worse up to 45k. The aircraft wing tips drop about 10-15 degrees back and forth along the flight path with the auto pilot engaged. Turn off the auto pilot, the oscillation stops. Flying along a flight plan is okay at altitude UNTIL you hit your first waypoint. At this time, the Oscillation starts and continues until you reduce your altitude by a lot. The aircraft swings back and forth, almost as if it is over correcting! NOTE: This issue had been fixed on an earlier release, but was reintroduced in a later release.