Show segue inexplicably changes to a modal segue when a container view controller is used

I don't know the exact cause of this but I am guessing it has something to do with a container view controller being used. I am actually using several containers, one is for a SWRevealViewController, which houses a generic UIViewController for its rearViewController and a UINavigationController for the frontViewController. The root view controller of this navigation controller is another container view controller, a MainViewController, which contains a UIPageViewController. Page view controller has 3 UITableViewControllers and when I try to navigate from those table view controllers to the relevant view controllers, and I want it to be a push transition, it makes a modal transition so what gives?

It is something to do with hierarchy I guess, but it is kinda messed up with all these view controllers right now and I think I broke my brain at some point. I would really appreciate if someone who knows what is wrong can explain.