Strange animation on iOS 7 when using hidesBottomBarWhenPushed in app built targeting < iOS 6

Strange animation on iOS 7 when using hidesBottomBarWhenPushed in app
built targeting < iOS 6

When I build targeting iOS 5 or 6, but run an app on 7. If I have a
controller in a navigation controller that is a part of a tab bar
controller, and I do the following:
controller.hidesBottomBarWhenPushed = YES;
[self.navigationController pushViewController:testController animated:YES];
A strange vertical positioning animation occurs. I would instead like the
new controller (with the bottom bar hidden) to push or pop on the
navigation controller pushing the tab bar out or bringing it back and with
no vertical positioning changes.
Video of Issue: http://cl.ly/1w0g3j293m03
Open Radar Report: http://www.openradar.me/14670329