iOS 7, corrupt UINavigationBar when swiping back f

I have an issue that I'm stuck on, but I have no idea why it even happens; If I push a detail controller on the stack, and I swipe back very quickly using the default left edge interactivePopGestureRecognizer, my parent/root view controller's UINavigationBar looks corrupt or something, almost like the built in iOS transition mechanism didn't have time to do it's job at resetting it after the detail view is gone. Also to clarify, everything in this 'corrupt' UINavigationBar is still touchable and everything on my parent/root view controller works perfectly.

For people downvoting due to no source code: there is no source code! This is an Apple bug!

Is there anyway to reset this UINavigationBar to what it should be when the parent/root view controller's viewDidAppear method gets called?

Note that this bug does not occur if I tap the top left back button instead of using the left edge interactivePopGestureRecognizer.

Edit: I added an NSLog to check the navigationBar's subview count on viewDidAppear on the parent/root view controller, and the count is always the same, corrupt or not, so I'd like to know why the popped controller is wreaking havoc with my UINavigationBar.

If you can help me at all, I'd greatly appreciate it! Thank you.

I've attached a screenshot of what it looks like: Note that the back chevron isn't part of my parent/root view controller, it's part of what was popped off the stack. Testing123 is the title for the parent/root view controller and not that of what was popped off the stack. The head and gear icons are part of the parent/root view controller.

Edit: I've thought something like this could fix the issue, but turns out it doesn't, and is really bad experience IMO too. This is not the kind of solution I'm looking for. I'm posting a large bounty so this can be resolved correctly!