Using UISplitViewController for displaying contact list and contact details screen. Primary, I have UITableViewController.
On didSelectRow: set segue/programatically handle delegate to call showDetailViewControler. it always pushes viewController. Question is instead of replacing secondary why need to push.
Most of solution I found that hide back button and keep on push and increasing navigation stack.
Print this
self.viewController(for: .secondary)?.navigationController?.viewControllers.count
on segue/didSelectRow delegate. count keeps on increasing.