When you play approache in solo, initially when you start your heading is say x. After about two seconds the heading suddenly changes to something different even you u dont turn. I noticed it to be x+20.
Here are a few pictures I captured.
As u can see i am approaching KNUC. Initially heading is 73 and then suddenly changes to 55. This is a bit of a problem while using A.P.
Hope for an answer soon.