iOS 14 beta 6 - UITabBarController + popToRootViewController - the selected tabbar icon is missing

Current result:

Refer here to reproduce the issue.

Basically the app structure is:

Bookmarks, Downloads, Favorites are embedded in a UINavigationController.

The problem is (as for subject): calling the popToRoot inside DetailsViewController the icon is missing.

navigationController?.popToRootViewController(animated: true)

Analyzing the Views Hierarchy via Xcode, the icon does not exist (it seems to have been deallocated).

Bonus: using the same code in the ListViewController (one level above the DetailsViewController) the icon is there and is correctly selected!

Thanks for your help!