iMessage Extensions: Root Navigation Controller results in all delegate methods to not get called in my MSMessagesAppViewController

I have a new iMessage Extension project where I tried 2 ways of structuring the navigation stack:

1. In my storyboard I set the entry point to a UINavigationController that has my MSMessagesAppViewController as the root controller.

2. Or I set my MSMessagesAppViewController directly as the Entry point in my storyboard. (No UINavigationController that owns it).

For scenario #1 above, the navigation controller works fine, and I can push new screens on the stack. (with the exception of the whole nav bar being hidden in Expanded view, which is a separate issue that I still have to figure out). However, NONE of the delegate methods of my MSMessagesAppViewController get called with this configuration. Such as: willTransitionToPresentationStyle didTransitionToPresentationStyle, willBecomeActiveWithConversation, didSelectMessage (none of these get called)

For scenario #2 above, the MSMessagesAppViewController methods DO get called. (because the UINavigationController is not the entry point in the Storyboard).

So my question is: How can I have a UINavigationController be at the root of my iMessage Extension application, so I can perform Push navigation, but at the same time have the methods of MSMessagesAppViewController get called, as described by the Apple API?