UITabBar always moves the full width when pushing a controller with HidesBottomBarWhenPushed

[Enricoza]

The tab bar seems to move at its own will, not following the animation block. Something else is moving it and I don't know if there is a way to safely make it follow my animation.

This is not really a problem, but would be nice if it was equal to the navigationController default animation in this case too.