Few hours into flight from chicago to narita, somewhere over the Bering Sea, plane went off course, flew in opposite direction for no apparent reason. Made sure to check route was proper, no waypoints too close to each other or bunched up, strong headwinds on route, but that’s never caused this before. Seemingly completely random issue. Did notice the Heading bug extended line doesn’t auto-align with current course heading, might this have something to do with this issue? See screenshots.
I’ve kinda noticed that as well. I was on a short 1:30 hour flight and after coming off AP+, my plane was flying beside the fpl and I had a headwind. Few waypoints after, it went back onto the fpl.