Marketing tactics... they want to give you time to buy the other holograms. Then they will release the Cobra, knowing everyone is going to buy that, too.
Yeah all the bobbles do that, re-initialising their rotation position and bend. Also hand animations/ positions, and viewpoint (I use an analog stick to look around the cockpit). I think I put in a bug report about it a while ago but nothing happened about it.
Seems to be an over-enthusiastic re-initialisation of everything when changing instance. Wouldn't cost much to hand the current values of these things over the fence when switching, but hey.