We are trying to add an interactive transition in our application between the two views. We can make it work fine on iOS 7 or iOS 8 without displaying the navigation bar. But we need to show the navigator. To demonstrate (some of) the problems that we had, I created a small prototype that shows the screenshots below. I tried UIPercentDrivenInteractiveTransition, but found enough messages, claiming that it has problems that I got rid of it.
Source : https://github.com/xaphod/TransitionBugger
Here's what it looks like on iOS 8 using the navigationController, but the navigation bar is NOT set to display in the storyboard: it works great

It displays the same thing, but with a navigation bar. When there is a navigation bar, then somehow there are no touches received in the toViewcontroller after the transition is completed (note how UIButton does not receive the touch event):

And perhaps this suggests that the navigator is in a malfunctioning state. See what happens if I describe the application and return to it - the state of the navigation panel changes: the button of the "Element" panel changes to "Back" only after the application appears in the foreground. Why is this happening?

I read at least 12 posts about stackoverflow, objc.io and other places with lots of suggested solutions and tutorials, etc. We tried them all, including these threads:
"From the view controller" disappears using UIViewControllerContextTransitioning (our main application has another problem)
Touch not recognized after user transition
... but they only work when there is no navigator displayed .
How can we make interactive transitions using navbar on iOS 8? All help is much appreciated.
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