Unstable Ai aircraft

I have noticed some strange behaviour from the AI(both default and addon) aircraft on the same routing as me. They are unable to hold on to a heading once they reach cruise altitude.When using the traffic explorer i see them swerve away every 1 minute or so and correct themselves. This behaviour goes away once i clear the high altitude winds. The aircraft seem unable to compensate for the winds and hold on to their heading. Is there a fix this? I know it sounds a bit picky but i prefer company on long flights!Regards